Physics

For rapid examination of spectral composition of white light. Consisting of metal tube with draw out focussing and an adjustable slit fitted with achromatic objective glass and element prism.

This direct vision spectroscope incorporates fine slit in conjunction with an efficient blazed grating, which transmit high proportion of energy into the first and second order spectra, giving very bright and sharp spectra. The third order spectra can also be seen, although not as brightly.

Spectroscopy is an interesting visual subject for students. This spectroscope helps teachers to demonstrate simply and clearly. Uses include; •Fraunhoffer lines •Flame test in chemical analysis •Absorption spectra through liquids •Bright line spectra from discharge tube Features; •Large diameter eyepiece aperture facilitates comfortable viewing of the single, large and bright spectrum which is centrally placed in the field of view •High quality optical components ensure that absorption bands show up clearly – even weak bands that are sometimes difficult to detect •The spectrum is generated by a particularly bright transmission diffraction grating of 600 lines/mm •Fixed construction – no need for adjustment •Robust assembly to withstand years of student handling •Benchtop size: 105 mm x 25 mm •Boxed weight: 115 g •Supplied in a protective rigid box

The performance of this ultra-low cost spectroscope is comparable with instruments costing much more. It uses a CD or DVD as a reflective diffraction grating and clearly shows Fraunhofer lines in the spectrum arising from natural light, distinctive emission bands from artificial sources such as sodium lamps and differences between different types of fluorescent lighting tubes. The spectroscope is made from polypropylene and supplied in flat pack form for quick self-assembly. It comes with free CD but can be used with any CD (or DVD for higher resolution).

An economically priced instrument, which is nevertheless capable of much useful quantitative work. The main structural parts, including the collimator and telescope bodies are heavy castings, other metal parts being bright plated. SCALE: 170 mm dia. divided to 360° 1°, independently rotatable with locking screw. spring-loaded vernier scale attached to the telescope mount provides readings to 0.1° (6 minutes of arc). COLLIMATOR: Mounted on a fixed pillar with axis adjustment. Objective lens 150 mm FL, an aperture of 21 mm and is carried in spiral focusing systems. Unilaterally adjustable slit 6 mm long. TELESCOPE: Mounted on moveable pillar with adjustment, locking screw and axis adjustment. Objective lens has 170mm FL, 21mm aperture and is carried in spiral focussing system. RAMSDEN EYEPIECE: With cross wires and locking ring focus adjustment. PRISM TABLE: The table is provided with three leveling screws and is line marked to assist placement of prism. STANDARD ACCESSORIES SUPPLIED: 1 prism clamp for prisms up to 40 mm high, 1 diffraction grating holder, aperture 25 x 25 mm, 1 small screwdriver, 1 tommy bar for axis adjustment and case.

Exclusive to Timstar, this superb, durable, easy to set-up and use digital spectrometer creates real-time images, graphs and measurements via the exclusive software. Once the software has been downloaded and installed, the spectrometer simply plugs into a USB port and the live-feed camera is selected by clicking on a tab. That's it you are now up and running. The software also includes a reference library of common elements. Suitable for use with: flame emissions from burning salts; spectral (gas) tubes; LED's LED columns; many other types of visible light source. Includes Camera, Tripod, USB lead, Software and Tutorial Videos. For video demonstration: timstar.co/RSPECvideo • Simple to set-up and easy to use. • All students see the same thing via classroom projector and whiteboard. • Camera auto-focuses and adjusts to wide range of light conditions. • Spectral range: 390 to 700 nanometres. • Accuracy: 1% or better. Spectroscopic features as narrow as nanometres can be measured. • Works with any Windows computer (XP or more recent). • Designed for education and research • No tricky calibration or adjustments to make- just plug and play • Comes complete with instructional videos (more than 30 minutes total)

Equal mass diameter cylinders showing the difference in density of metals. Comprises six 100 g, 16 mm diameter cylinders of brass, lead, copper, iron, zinc, and aluminium in wooden holding block.

A set of cubes for density investigations or comparison of different materials, consisting of nine 25 mm sided cubes. Set includes brass, iron, copper, aluminium, hardwood (beech), softwood (pine), nylon, PVC and acrylic. Supplied in wooden box.

A quality piece of apparatus to demonstrate the relationship between the extension of a spring and the load applied to it. Consists of a moveable 120 mm scale that is mounted on a stand and base. Comes complete with a combined mass hanger/pointer which is connected to the suspended spring to allow easy reference to the scale. Dimensions (H x Dia.): 250 x 100 mm.

Comprising aluminium, brass, copper, iron, lead, zinc and tin. By examining properties such as magnetism, density and appearance, and comparing to known data, students can identify each material. 10 mm dimensions set.

Comprising aluminium, brass, copper, iron, lead, zinc and tin. By examining properties such as magnetism, density and appearance, and comparing to known data, students can identify each material. 20 mm dimensions set.

Set of discs comprising aluminium, brass, bronze, copper, nickel silver, steel, stainless steel, and zinc. The metal name is stamped onto each disc.

Set of metal pieces each stamped with the identifying letter. Comprising: soft aluminium, hard aluminium, magnetic stainless steel, non-magnetic stainless steel, zinc, zinc plate, nickel silver, bronze, galvanised steel, mild steel, copper and brass.

Dimensions, 200 x 12 mm.

Dimensions, 200 x 12 mm.

Dimensions, 200 x 12 mm.

Dimensions, 200 x 12 mm.

This economical version of Young's modulus apparatus includes 0 - 30 mm scale and moveable vernier readable to 0.1 mm. Both have bars with clamping screws for the wires and hooks for the tension weight and loading masses. The apparatus come supplied with clamp for fitting and tension weight, mass 1.3 kg approx. for the comparison wire. Complete with wires.

For the experimental determination relationship between load applied to wire and the resulting extension. Consisting of an engraved brass scale with vernier reading to 0.1 mm. Complete with tension weight but without load masses.

Set of 6 wires for use with Young's Modulus, Searle's Pattern (MA190050). Please note this is wires ONLY.

Designed by Timstar in response to customer enquiries, the Rubens' Tube provides a memorable demonstration of standing waves. The Rubens' Tube consists of a 10 cm diameter aluminium tube with row of small holes drilled along the top, and a 15 W loudspeaker mounted at one end, and is supplied with instructions. Natural gas or LPG can be used, with a length of burner tubing to connect it to the supply. The speaker can be driven directly using signal generator with power output, but Rubens' Tube Driver (SO180900) is recommended for best effect.

Useful set of accessories for use with the microwave apparatus, including the following, mounted on feet for free standing: • Aluminium plates, 200 mm x280 mm • Aluminium plate, 60 mm x280 mm • Perspex plate, 200 mm x280 mm • Polarization grille, 200 mm 200 mm

This battery operated microwave probe detector allows the student to measure, plot and investigate the microwave field intensity. The probe is slightly less sensitive than the normal receiver, and is largely non-directional. The unit benefits from built in amplifier with variable gain and meter displaying the relative signal strength.Output can be taken via the BNC connector either to an oscilloscope or meter. The probe detector is compatible with most 2.8 cm microwave educational systems on the market. • 2.8 cm microwave probe receiver • Mobile, easy to use, battery operated • Built in illuminated signal strength meter • BNC terminated output for use with oscilloscope, meter or audio amp • Gain control • Non-directional

This apparatus is designed for demonstration of standing waves and for determination of the wavelengths of sound waves in air. The tube is supplied with a millimetre scale and moveable piston for changing the length of the air column. (You will also need an external sound source e.g. 1 kHz tuning fork.) Dimensions (L x Dia.): 660 x 300 mm.

This apparatus is ideal for all resonance investigations in air columns particularly the Salters MUS Activity 9. The main tube takes high power sound wave generator unit plugged in to one end. The generator is driven by a standard laboratory signal generator and as the frequency is adjusted the various resonance modes are detected by increased loudness of the note. The open pipe can be studied or a variable length closed pipe can be used by inserting the piston assembly provided. By using a higher amplitude on the generator, Kundt's tube investigations can be undertaken. Fine cork or polystyrene dust is distributed throughout the tube and at resonance the powder gathers at the nodes. Wavelengths can be easily measured. To get a good response a closed tube is preferable, to reduce the sound levels in the laboratory while producing a measurable effect. The apparatus comes complete with two supports for the tube, sound wave generator, resonance tube, closing bung and full instructions. Dimensions (L x Dia.): 1 metre x 50 mm.

An overhead projector type ripple tank for demonstration of various wave phenomena, including reflection, refraction, diffraction, and interference. The unit comprises a shallow 40 x 40 cm tank with a scratch-resistant acrylic window on the bottom, supported by four adjustable legs. Two arms on the side hold an eccentric motor and bar assembly, onto which either two point dippers, or a plane-wave dipper can be attached. The motor and bar assembly is suspended by springs so the vibration is not transmitted to the tank. A bright point light source is held overhead, which shines down through the water in the tank, and casts a shadow of the waves on the bench below. The following accessories are included: Concave, convex, rectangular Perspex plates; curved reflector; two large one small barriers; two point dippers; hand stroboscope; banana leads; instructions. The motor requires continuously variable 0-5 V DC power supply, and the lamp requires 12 V AC supply. Alternatively, the ripple tank can be driven by the SO180324 ripple tank LED driver.

This driver and LED lamp is designed for the classic overhead projection type ripple tank. It features variable DC output for the motor, and another output for the LED. Electronics in the unit measure the oscillation of the unbalanced motor to calculate the frequency of the waves it generates, and can therefore modulate the LED to freeze or slow down the waves without the need of stroboscope. The LED can be set to: • ON where it is on constantly • FREEZE where the frequency matches the waves • CUSTOM the strobe frequency is controlled independently, allowing the waves to appear to move slowly or even in reverse! Compatible with ripple tanks SO58320, SO180320, and most similar ripple tanks from other suppliers. An exclusive product developed by Timstar in partnership with IPC Electronics, designed and manufactured in the UK.

Designed by Timstar in response to customer enquiries, the Rubens' Tube provides a memorable demonstration of standing waves. The Rubens' Tube consists of a 10 cm diameter aluminium tube with row of small holes drilled along the top, and a 15 W loudspeaker mounted at one end, and is supplied with instructions. Natural gas or LPG can be used, with a length of burner tubing to connect it to the supply. The speaker can be driven directly using signal generator with power output, but Rubens' Tube Driver (SO180900) is recommended for best effect.

This unit can be used to drive the Rubens' Tube with an audio source, such as an MP3 player, or device with signal generator app. It features a 3.5 mm socket for an input, and includes a lead to connect it to a signal source, such as the headphone output of mobile phone or laptop. A stereo signal is converted to mono so both channels can be heard on the Rubens' Tube. Output is via pair of 4 mm sockets, for connection directly the Rubens' Tube speaker. It is powered by plug-top power supply.

A compact loudspeaker unit fitted with 10 watt, 8Ω driver. Connection is via colour coded 4 mm sockets. Fitted into durable ABS case.

This speaker is well suited to laboratory demonstrations using sound. It comprises 10 W RMS (20 W PMPO) 8 Ω impedance speaker in robust beech wood and acrylic frame, with 4 mm sockets mounted on the front. The design means that the loudspeaker can be used in either a vertical or horizontal position. Speaker diameter: 125 mm. Dimensions: 225 x 175 x 100 mm.

The small size of this microphone makes it ideal for experiments with sound interference. Other typical applications are measurement of sound frequencies, speed of sound experiments and the recording of sound by data loggers. The microphone is supplied with a one metre cable which connects directly to the electronic counter TI68730 or timer FO140110. It can be connected to an oscilloscope or other measuring instruments via power supply HE110105. Supplied with 10 mm diameter support rod. Dimensions (L x Dia.): 105 x 30 mm.

A hollow wooden sounding box with scales divided in mm between fixed bridges over which three wires are stretched. To one wire, spring balance reading to 100 x5 N is fitted and the tension exerted and measured can be finely adjusted by a wing-nut. Another wire passes over a pulley and can be loaded as desired. A third wire is provided for comparison, its tension may be adjusted by means of a wrest-pin The distance between the fixed bridges is 72 cm. Complete with three movable bridges, wrest-pin key and a set of steel wires, length 1.5 m of 22, 24, and 26 SWG. The pack of replacement wires, sold separately, has steel and brass wires, each in 22, 24, and 26 SWG. Dimensions (L x W x H): 129 x 13 x 11 cm.

An improved version of the classic Bell in Jar experiment. The base is fitted with rubber sheet which ensures a good seal between the jar and pump plate, without the need for vacuum grease. The pump plate is lightweight aluminium, mounted on a heavy tripod base, with a tube connection to the central pillar to evacuate air from the bell jar on top. A stopcock allows the chamber to be sealed, allowing the vacuum to be kept when turning off the pump. The bell jar is robust acrylic which is safe in the event of implosion, and has flat flange to ensure good seal with the pump plate. The bell is suspended by wires to reduce conduction of sound to the bell jar. Connection is by 4 mm sockets on the top bung. The bell can be heard getting quieter as the air is evacuated. Then, by closing the tap, turning off and disconnecting the pump, and then slowly allowing the air back in, the bell can be heard getting louder, as air is required to conduct the sound. The high-quality bell operates on 4-6 V DC or AC. Requires suitable vacuum pump, and heavy-walled vacuum/pressure tubing. Dimensions: Bell Jar • Height 260 mm to neck • Internal diameter 140 mm • External diameter flange 180 mm Pump Plate • Height 195 mm • Diameter 250 mm

Pump plate for SO180500.

Bell jar for SO180500.

An effective and compact alternative to the traditional Bell in a Jar apparatus. Comprising a strong acrylic vessel, with a simple buzzer circuit. The vessel has an outlet through which air can be evacuated using a vacuum pump (not included). The buzzer is mounted on foam to reduce transmission of sound to the vessel walls. When the air is evacuated, the sound of the buzzer is attenuated, as there is no air through which the sound is transmitted to the walls of the vessel. Dimensions (H x dia): 140 x 100 mm

For use with a standard bell jar for demonstration experiments involving low pressure. The plate is made of PVC and has a vacuum connection fitting with valve and thumb screw for the return air. Two standard 4 mm jack connectors are provided with 4 mm jack connectors available inside the jar. Tube Dimensions (Dia.): 10 mm. Plate Dimensions (Dia.): 210 mm. • For use with 150 mm diameter bell jars only

A crystal microphone giving 10-20 mV output without batteries. Used for displaying students' voices on sensitive oscilloscope, or for speed of sound experiments. Fitted with mm colour coded sockets. • Frequency range: 100-10,000 Hz • Impedance: 200 Ω • Sensitivity: mV/Pa/kHz

This 4W, 8 Ohm Mylar-cone loudspeaker comes mounted on an acrylic base, so that it can be used either vertically or horizontally. The front of the speaker has a hard protective cover with drilled holes. Dimensions (Speaker Dia.): 60 mm. Overall Dimensions (H x W x D): 120 x 90 x 40 mm.

This Sonometer pickup contains a single guitar-type magnetic pickup. When placed under a moving steel wire, such as on Sonometer, an emf is induced in the pickup which can be displayed on an oscilloscope. Period, frequency and amplitude measurements can then be taken from the oscilloscope screen. The whole unit, constructed in clear acrylic, measures approximately 90 x 40 x 20 mm and comes with integral 4 mm sockets and instructions for use.

Aluminium. Boxed set of 8. Range C.256 Hz to C512 Hz.

This digital xenon stroboscope is a lightweight, sturdy and compact instrument which features digital, variable flashing rate adjustment and external triggering facility. The bright xenon tube makes it ideal for educational uses such as wave, motion and vibration experiments. Supplied with a mains lead. Specifications: 60 to 18,000 rpm, to 300 Hz, External triggering signal, Power supply: 240 V AC, 50 Hz. Dimensions (L x H x W): 215 x 140 x 150 mm.

A generator for producing mechanical vibrations when used with function generator. The input is fed to coil which is mounted within the field of cylindrical permanent magnet. The unit is fuse protected. Locking mechanism protects from shock during transit and when changing accessories. Max input 6V/1A. Dimensions (L x W x H): 100 x 100 x 120 mm.

For use with SI30825 for demonstrating the relationship between frequency and the number of vibrational nodes. Dimensions (Dia.): 290mm.

For use with SI30825. A thin layer of sand is spread over the plate and resonance patterns (""Chladni"" figures) can be observed at certain frequencies. The plate resonances are audible.

For use with SI30825. A thin layer of sand is spread over the plate and resonance patterns (""Chladni"" figures) can be observed at certain frequencies. The plate resonances are audible.

Steel strips giving six vibrating lengths. For use with SI30825. Fundamental frequencies at 11, 15, 21, 36 and 50 Hz can be readily observed. Interesting standing waves can be seen up to 300 Hz and heard up to 900 Hz.

For use with SI30825. For demonstrating standing waves. Dimensions (L): 2 metres.

This quality spring is ideal for producing longitudinal waves with vibration generator connected to a signal generator. Spring constant 4.7 N/m. Closed Dimensions (L x Dia.): 155 x 27 mm.