Physics

Comprises a capillary tube and thermometer, mounted on a board with a scale behind the capillary tube. The apparatus comes complete with oil in the capillary tube, so no difficult filling with sulfuric acid is required. The relationship between temperature and volume can be observed easily, and an estimate for absolute zero can be obtained through extrapolation of experimental data. Also availabler individually.

The apparatus comprises reservoir with bourdon gauge, connected to vertical glass tube. The reservoir has a needle valve to control pressure, and a high-quality tyre-type valve for attaching the supplied pump. Air does not escape when the pressure is increased, until the needle valve is opened. The pressure is displayed on a bourdon gauge, which has a transparent back, allowing students to see the internal workings. Pressures of up to 3.5x atmospheric pressure can be measured, which provides a good range of measurements. The tube is of strong construction, and is further protected by a plastic safety screen. It has graduations so that the length of the air column can be measured, and is of uniform cross-section, so the volume of air is proportional to the length of the air column. Unlike traditional Boyle's Law apparatus, this unit has no rustable materials, so water can be used instead of oil, which offers superior results, as well as reduced hazard and mess. The water is pumped into the tube, and the pressure and volume of air is measured at regular intervals. The inverse relationship between pressure and volume at constant temperature is easily observed.

This apparatus vividly demonstrates the rise in temperature that occurs when a fixed mass of air in a transparent cylinder is compressed by a hand operated piston. A piece of tinder, which is provided, ignites in the transparent cylinder: much as a diesel engine obtains ignition. The cylinder and piston can also be used to demonstrate the effect of decompression, being the immediate lowering of temperature and the consequent condensation of water vapour inside the cylinder the cloud formed can easily be seen. Cylinder Dimensions: (L) 198.00 mm (OD) 15.00 mm (ID) 9.00 mm

Spare cylinder for Hyman Fire Piston, HE43250.

Spare Tinder for Hyman Fire Piston, HE43250.

This 80 mm diameter hollow metal sphere is connected to manometer (Bourdon) gauge, for demonstrating changes of pressure in closed volume of air when either heated or cooled. Immersing the ball in heated water bath or ice bath allows the relationship between pressure and temperature of the enclosed air to be investigated. The metal sphere is more robust than glass versions and responds to temperature changes little faster.

This simple low-cost apparatus provides means of demonstrating Boyle's law. It is not 100% accurate but it is adequate for demonstrations giving students literally 'feel' for increase in pressure against volume.

A 1 litre capacity round can with screw cap.

To show that the level of liquid in connected vessels is constant irrespective of the vessel size or shape. Consists of four different glass vessels connected by common base tube and mounted on base. Dimensions (L x W xH): 230 x 100 x 160mm.

Hollow metal cylinder with overflow spout. Dimensions (L x Dia.): 100 x 50mm.

For demonstrating how pressure increases with depth. Consisting of a metal cylinder with three identical sized outlets at different levels down one side. Dimensions (H x Dia): 400 x 70mm.

Two-piece set. Brass ring and brass ball mounted in wooden handles. Dimensions (L): 260 mm.

An improvement on the riveted version, this bonded copper and steel bimetallic strip comes mounted in a wooden handle for ease of use. Heating on either side causes the strip to bend as the two metals expand by different amounts. Comes with instructions. Dimensions (L incl. handle): 300mm); Bimetallic Strip (L x W) 200 x 13 mm.

Optical quality rectangular glass block for refractive experiments. Dimensions 114 x 63 x 18 mm (L x W x D).

Rectangular block, 115 x 65 x 18 mm.

Biconvex lens, 75 x 115 x 10 mm (L x radius x D)

Biconcave lens, 75 x 115 x 10 mm (L x radius x D)

Semi-circular block, 75 x 10 mm (Dia x D)

Equilateral Prism, 75 x 10 mm (L of all sides x D)

Set of acrylic blocks including OP11810, OP11815, OP11820, OP11825 and OP11830, pluc a triangular prism.

Acrylic block in the form of shallow S-Shape, ideal for demonstrating total internal reflection. Dimensions 220 x 20 x 20 mm.

The set contains ten 25 mm-thick optical acrylic prisms: - Equilateral triangle 75 mm sides - Equilateral triangle 57 mm sides - Isosceles 90°- 71 mm hypotenuse - Scalene 90° - 78 mm hypotenuse - Rectangle 75 mm x 50 mm - Semicircular 75 mm - Biconvex 75 mm - Biconcave 75 mm - Plano - convex 75 mm - Plano - concave 75 mm

Flexible acetate transmission filter material suitable for making slides for colour mixing experiments or any work involving coloured light. Each set contains sheets: Primary Red, Primary Blue, Primary Green, Magenta, Cyan, Yellow and Neutral Density. The neutral density material gives 50% light transmission with no colour change. Dimensions (L x W): 210 x 148 mm.

Mounted 35 mm slide, red.

Mounted 35 mm slide, green.

Mounted 35 mm slide, blue.

Supplied in A4 sheets in colours red, blue, yellow, green, and orange.

Laminated transparent plastic colour sheets, one each of the primary colours red, blue and green and one each of the secondary colours yellow, cyan and magenta. The sheets are joined at one corner so that different combinations can be overlapped for colour mixing. Dimensions (L x W): 73 x 50 mm.

This Newton's Disc consists of an aluminium plate with coloured segments printed on it. The colours represent the colours of the visible spectrum (red, orange, yellow, green, blue, indigo and violet). When the disc is rotated and the speed increased, the colours start to blur and fuse together and then mix so that the eye, unable to respond rapidly enough, sees this effect as white light. Mounted on base with handle at rear to turn the disc. Weight: 0.8 kg. Dimensions (L x W x H): 250 x 150 x 25 0mm.

This unit contains three coloured light sources (red, green and blue) projected onto screen in overlapping circles. The unit is self-contained, meaning no setup is required, and can be used comfortably by 2-3 pupils at time. The brightness of each light can be controlled independently, allowing any combination of the three. This allows the demonstration of composition of any colour using just the primary colours. Requires 3 x AA batteries.

This motorized Newton's colour wheel is useful for demonstrating that white light is composed of combination of different spectral colours. Comprises a disc with different coloured sectors mounted on low voltage (6V DC) motor box with integral 4 mm sockets. When the disc is rotated at fast enough speed the colours merge to form white (usually off-white). Requires standard variable laboratory power supply (1-6 DC).

An upright case contains three, high powered, accurately colour matched LEDs, each of which has infinitely adjustable brightness. Also supplied is a large, free standing, primary colour shadow mask,a hand held secondary colour mask and a 12 V plug top power supply. The system allows the teacher to project large primary and secondary colour mixing disks onto any vertical surface and to adjust the colour saturation to mix virtually any colour (how do you produce brown). Unlike other systems the purity of the resulting white is outstanding. The unit is extremely easy to use, is easily transportable and comes with full instructions. The only other requirements are a white wall and a darkened/blacked out room. The system may be used to demonstrate both secondary and primary colour mixing, colour shadows and colour reflection/absorption.

Mounted in 50 x 50 mm slide holders. Aperture size 36 x 24 mm. With tough plastic frame. Made in the UK.

Mounted in 50 x 50 mm slide holders. Aperture size 36 x 24 mm. With tough plastic frame. Made in the UK.

Mounted in 50 x 50 mm slide holders. Aperture size 36 x 24 mm. With tough plastic frame. Made in the UK.

Mounted in 50 x 50 mm slide holders. Aperture size 36 x 24 mm. With tough plastic frame. Made in the UK.

Set of gratings 96, 300 and 600 lines/mm mounted on single slide with three 16 x 19 mm apertures. Dimensions 90 x 30 mm.

Economy diffraction grating in 50 x 50 mm plastic slide. Aperture 36 x 24 mm. Screen printed on the slide are the lines/mm, and arrows to indicate the direction of the lines and gaps.

Economy diffraction grating in 50 x 50 mm plastic slide. Aperture 36 x 24 mm. Screen printed on the slide are the lines/mm, and arrows to indicate the direction of the lines and gaps.

Economy diffraction grating in 50 x 50 mm plastic slide. Aperture 36 x 24 mm. Screen printed on the slide are the lines/mm, and arrows to indicate the direction of the lines and gaps.

The relationship between light and colour has never been explained so clearly as with these fun glasses. The double-axis diffraction grating embedded in the lenses ensure that, when looking through these glasses, almost any single light source can be split into 3D spectrum of the component colours. Specifically designed to fit students up to to KS3 but will fit older students.

A Class II ≤ 1 mW) laser pointer for lectures and demonstrations. Powered by 2 x AAA batteries (Not Supplied). Red laser specification 630 - 680 nm

This kit comprises a red laser which attaches and rotates around a graduated plate, which makes it easy to see and measure the incident beam angles for both reflected and refracted beams. It can be used in vertical plane with the cylindrical tank with water or in horizontal plane with the glass optical accessories, which are included. Useful to demonstrate: Verification of the Snell's law of refraction with semi-circular block or cylindrical tank; Total or diffuse reflection with plane mirror; 90° reflections in 90° prism; Double refraction with parallel faces; Determination of the angle of prism; Multiple reflections and refractions in trapezoidal prism. Kit includes; •1 x Laser (powered by 2 x AA batteries – not included) •1 x graduated disc 50 mm diameter •1 x cylindrical tank •1 x plane mirror •1 x rectangular block •1 x right angle prism •1 x semi-circular lens •1 x trapezoidal block

This quality combination class II laser pointer has options for both red and green lasers and is ideal for highlighting and presentations or for comparing the properties of red and green laser light. The unit has chrome finish exterior. 2 x AAA batteries required (not included). Red laser specification: 650 nm, <1 mW. Ultra bright green laser specification: 532 nm, <1 mW. BS EN 60825 compliant and labelled.

A class 2 (< 1mW) laser emitting purple/violet light at 405 nm. Great for demonstrating Total Internal Reflection in bottle of tonic water!

Superb class II (≤1 mW) laser pointer emitting true blue laser light, at wavelength of 445 nm. An excellent addition to the laser range for diffraction experiments etc.

This class II (≤1 mW) red/orange laser pointer, emitting light at wavelength of 635 nm, provides higher visibility (brighter) light than standard 650 nm red lasers for the same power output.

Double concave. Optically worked glass with ground edges. Dimensions (Dia.): 38 mm.

Double concave. Optically worked glass with ground edges. Dimensions (Dia.): 50 mm.

Double convex. Optically worked glass with ground edges. Dimensions (Dia.): 38 mm.