Physics

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.

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

Clear glass with polished faces and ground edges. Dimensions (H x W): 50 x 45mm.

Clear glass with polished faces and ground edges. Dimensions (H x W): 50 x 45mm.

Clear glass with polished faces and ground edges. Dimensions (H x W): 50 x 45mm.

Wood with 'V' slot to hold lenses up to 80 mm diameter.

These round, unmounted, optically worked glass mirrors are premium quality, incorporating vacuum coated silver reflective backing with protective coating, for superior finish. Dimensions (Dia.): 50 mm.

These round, unmounted, optically worked glass mirrors are premium quality, incorporating vacuum coated silver reflective backing with protective coating, for superior finish. Dimensions (Dia.): 50 mm.

Glass, unmounted. Silvered back with protective coating.

Flexible. Can be cut with scissors or sharp knife.

Flexible. Can be cut with scissors or sharp knife.

Semi-circular concave mirror. 150 x 75mm (L x H)

Semi-circular convex mirror. 150 x 75mm (L x H)

Plane glass mirror, mounted on wooden support block for convenience. Removes the need for separate support block to hold mirror perpendicular to work bench.

Plane glass mirror, mounted on wooden support block for convenience. Removes the need for separate support block to hold mirror perpendicular to work bench.

A pack of 43 mm cube wooden blocks with 4 x 15 mm slot for supporting plane mirrors during optical experiments on reflection.

These come mounted in 35 mm slide holder. O.1 mm spacing.

These come mounted in 35 mm slide holder. 0.5 mm spacing.

These come mounted in 35 mm slide holder. 1.0 mm spacing.

For fixing of optical equipment with max. 10 mm diameter fixing rod. Made of black-anodised Aluminium with thumb screw and measuring line. Suitable for use with the Premium Optical Bench OP66520, and Radioactivity Bench Kit RA95610. Dimensions (W H L): 35 50 84mm.

In laminated plastic with white surface with 10 mm fixing rod. Dimensions (H x W): 250 x 250 mm.

Made from black-anodised aluminium with mm scale. 1m long, cross section 26 x 82 mm. Supplied with adjustable levelling feet with rubber pads, sliding saddles with 10 mm bore fixings to accept accessories, sliding saddle for optical disc and 10 mm hole.

This compact Optical Bench with an LED light source offers excellent support and alignment of the optical elements. Ideal for use where space is at premium or as an economical alternative to full length optical bench, the light source is bright LED which does not get hot and should give thousands of hours use without replacement and, of course, electricity consumption is very low. The lenses and the objects (Ø50 mm) are held tight in the lens holder with ring which can be tightened to ensure precise positioning and prevent risk of damage. Contents include: 1-metre rail, graduated in mm, 1 LED light source on support, 4 sliders, 2 lens holders, 1 white screen, 1 F-letter, set of 3 diaphragms (Ø 3, 5 and 8 mm), 1 set of lenses (F -100, +50, +100, +250).

This full length Optical Bench is more comprehensive version of the 1 metre bench and includes powerful LED light source with adjustable condenser. The LED light source, which does not get hot, should give thousands of hours use without replacement and the electricity consumption is very low. The rail offers excellent support and alignment of the optical elements. The lenses and the objects (Ø 50 mm) are held tight in the lens holder with ring which can be tightened to ensure precise positioning and prevent risk of damage. Contents include: A 2-metre rail, graduated in mm, 1 LED light source with adjustable condenser and support, 8 sliders/lens holder + 4 lens holders, 1 prism + 1 prism holder, 1 white screen + 1 ground glass screen, 1 F-letter, set of 3 diaphragms (Ø3, 5 and 8 mm), 1 set of lenses (F -100, -50, +50, +100, +200, +500), 1 concave mirror + 1 convex mirror + 1 plane mirror.

An optical bench kit that fits in suitcase! The complete kit, including the bench itself, can be disassembled in seconds, and stored conveniently and safely in its stylish, robust suitcase. The bench features guide at the rear to ensure the riders are correctly aligned, and cm/mm scale on the front. It comes in three parts which clip together easily to form 1.1 m track. The riders can take either 10 mm diameter rod, or 2.5 mm thick sheet. They feature pointer so their position can be read from the scale on the bench. The lens/slide holders can accommodate either a 40 mm diameter optical device such as mirror or lens, or a 50 x 50 mm slide such as diffraction grating or colour filter. The white LED also fits in this holder. All parts of this kit are available separately. • 1.1 plastic bench in 3 parts • White LED with Power Supply • 5 riders (1 with knearled screw) • 4 lens/slide holders • 1 prism table • 5 circular apertures (1.5/3/6/10/20 mm) • 1 single slit • 1 triple slit • 1 figure of '1' • 6 plastic lenses (focal lengths -100/-200/+50/+100/+150/+250 mm) • 1 mirror (50x50 mm) • 1 white screen (100 150 mm) • Suitcase 320 x 430 x 115 mm • Weight 1.9 kg

Nickel plated steel, 51 mm long. In packs of 100.

A white acrylic screen mounted in wooden base, suitable for image projection in optics experiments. Dimensions (H x W): 190 x 120 mm.

This apparatus is designed to determine the approximate value of Planck's constant, using a range of LEDs of known wavelength, to allow the electron/photon energy to be calculated. There are LEDs, covering the light range from deep blue at 470 nm to near IR at 940 nm, mounted on box with 4 mm sockets for attachment to voltmeter and ammeter for voltage and current measurements. By monitoring the voltage at which each LED just begins to emit light, graph of energy input as function of light emitted frequency can be plotted and an approximate value of Planck's constant can be deduced. Requires a 9 DC power supply (standard lab power supply).

Antique style mains bulbs, useful for optics experiments as the low brightness filament makes useful object for projection of an image, determining focal length etc. They have the added bonus of being an attractive form of mains lighting! Voltage: 230 AC. Power rating: 60 W.

This pinhole camera class kit contains enough components to make 10 pinhole cameras. The kit includes 10 square section black plastic tubes, 200 x 60 x 60 mm each, pre-cut black card and translucent paper for mounting on either end of the tubes. A small pin-hole in the black card will then project an image onto the translucent paper at the opposite end of the tube. Requires a bright light source (e.g. carbon filament or antique lamp) or desk lamp with suitable object to project an image.

High quality polaroid filters, sandwiched between glass sheet for rigidity and ease of cleaning, and mounted in 35 mm slide holder frame.