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NEWTON’s RINGS

Experiment(s):

1. Determination of wavelength of sodium lamp

2. Determination of focal length of convex lens

3. Determination of refractive index of water/liquids



Specifications:

a) Microscope
Newton’s rings microscope
Reflector: 45° turning glass plate
Metal assembly with knob screw
Fixed glass plates and lens assembly
Base material: Cast iron
Moving components: Brass
Reading: Screw gauge type
reading micrometer
x-movement: 50 mm
Resolution: 0.01 mm

b) Sodium vapour lamp set
(Optional)
Lamp: Philips / Thorne 35 W
Lamp house: Single lamp type
with fixed slit openings
Transformer: 35 W, Instant ON type
Rated Input: 220 V/50 Hz
or 110 V/60 Hz

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