Optics

240 V Rough Service lamp which adequately replaces the traditional carbon filament lamp but has the added benefit of being more robust. Suitable for use in optics experiments such as pinhole cameras, projection of an image, determining focal length of lens etc.

Metal spring clip holder with grooves to hold 50 mm round lenses or mirrors, mounted on base with slot cut out to accommodate metre or half metre rule.

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.

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)