For use in a wide range of optics experiments including focal length of lenses, curvature or mirrors and lens combinations etc.

Comprises of :
Non-twisting aluminium alloy bench (1,200mm) with easy to read scale divided into cm and mm
3 x universal holders on sliders
6 x 50x50mm slides
100x100mm double sided scaled screen on slider
Raybox/Light source with mounting rod, bulb (12V, 24W), 2m of flex and 2 x 4mm plugs
2x slit sets
50x50 plane mirror
50x50 aluminium plates

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Glass faced on one side in aluminium case. 
Dial marked with the cardinal and ordinal points of the compass. 
Diameter: 16mm.
Pack of 10.

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This large scale demonstrator comprises of 5 inch polarising sheets mounted on a graduated frame and placed on a wooden stand. 
In this demo, the clear pieces with different shapes are placed between the filters and squeezed. 
Stress patterns then can be observed. 
It is supplied with clear acrylic pieces of different shapes so different stress patterns can be demonstrated. 

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Polaroid sheets mounted in square plastic slides for demonstration purposes.

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A graphic depiction of key heat concepts. 
Laminated
Includes an illustrated view of the sources of heat; the transfer of heat energy; heat absorption; the expansion and contraction of matter; and much more.

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Rotary linear potentiometer mounted on a channel box.
Connection made to 4 mm sockets. 
Choice of values. 
100Ω
Protection against student's wrong connection by means of fast blow fuse.

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A popular, advanced, continuously-variable power supply unit with LED digital display, the College Power Supply Unit is ideal for demonstration purposes and for use by students in advanced level courses. 
It provides a fine and smooth, continuously-variable AC or DC voltage at a combined maximum current of 8.5A. 
Microprocessor tripping circuitry will differentiate between a real short-circuit or a temporary current surge.
The DC is smoothed by an internal 2200µF capacitor. 
AC or DC voltage reading is selected by a toggle switch and indicated by a bright green, easy-to-read 12.5mm LED display. 

Technical Specifications :
Output Voltage continuously variable by rotary knob from 0 to 25V
Continuously rated combined current of 8.5A, AC or DC
Heavy-duty 40A Schottky barrier diodes employed for rectification, together with high performance toroidal transformer, reduce the weight of the power supply and power waste - thus eliminating the need for a noisy and troublesome cooling fan.
Slow-blow fuse-protection for primary.
Thermal fuse protection for transformer.
Digital display for voltage for AC or DC, selected by toggle switch
Fully protected secondary by high speed, resettable microprocessor-controlled trip.
Dimensions: 300 x 115 x 155mm (W x D x H)
Weight: 5.5kg

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This unit is the same as Power Supply, Stepped but is specially smoothed for electronics applications.

Technical Specifications :
Dimensions: 220 x 110 x 145 mm (W x H x D)
Input: 230V AC, 50Hz
Output: 2-12V AC/DC in 6 steps
Current: 5AMP

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