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 NEWTONS RING APPARATUS

 

For studying interference fringes due to sunlight or monochromatic light.
Consist of a plano-convex lens, diameter 60mm, and an optically polished (worked) flat glass plate mounted on a ring metal pressure frame with three compression adjusting screws for proper centering of concentric circular Newton rings.

Cat. No.

3370-00


 SPECTROSCOPE, DIRECT VISION

 

For quantitative examination of spectral composition of white light, radiant bodies etc.
Comprises a metal draw-out tube of 20mm diameter, with an adjustable slit at one end. The light passing through this slit falls on the prism elements and break up into a spectrum. This can be viewed through an eye piece at the other end of the tube. Fully drawn-out length is 130mm. Supplied in a velvet lined case.

Cat. No.

3372-00


 STROBOSCOPE, HAND DRIVEN, SIMPLE MODEL

 

For optically slowing or completely stopping any object in motion and for measuring the frequency of periodic motion.
Consists of a black metal disk of 250mm diameter with 12 evenly spaced radial slits extending to its edge, an axis hole for mounting a handle and a finger hole. Handle and mounting screw are included.

Cat. No.

3374-00


 SPECTRUM DISCHARGE TUBES

 

To show spectral lines of pure substances. Mercury and helium tubes can be used as sources for experiments on the measurement of wave length of light. The gas pressure used results in well-defined emission spectra.
These are glass tubes about 26cm long, central capillary portion about 9-10cm long with electrodes sealed at both ends and connected to lead wires protected by metal caps. Provided with loops welded to caps for electrical connection. Needs an induction coil 5cm spark, or a suitable transformer. Except for neon and helium, these can not be used as lamps. Length of capillary portion can be varied as required. For intermittent use.

Type

Cat. No.

Air

3376-01

Argon Gas

3376-02

Carbon dioxide

3376-03

Chlorine gas

3376-04

Helium gas

3376-01

Hydrogen Gas

3376-02

Iodine

3376-03

Krypton gas

3376-04

Mercury vapor

3376-04

Neon gas

3376-01

Nitrogen Gas

3376-02

Oxygen gas

3376-03

Water vapor

3376-04


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