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Product Code: PY-115
Availability: 1156
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Product Description

Experiments: To study the formation of Newton's rings in the air-film in between a plano-convex lens and a glass plate using nearly monochromatic light from a sodiumsource and hence to determine the radius of curvature of the plano-convex lens. where Dn = the diameter of the n-th ring and R = the radius of curvature of the lower


1. Newton Ring Microscope with Built in Newton ring assembly, with plane adjustable glass and condenser lens

Microscope : Mounted on a travelling carriage with 30x magnification with 75mm focusing distance, by rack & pinion.

Reading : The longitudinal movement of the microscope for the purpose of the Rings is done by rotating the drum. The 26mm moment can be read by scale and on the divided drum to 0.001 cm. 

Newton's Ring Attachment:it consists of optical flat glass and one Plano-convex lens (25mm radius) arranged inside a metal case resting over the stage of the instrument where Rings are formed which can be adjusted with the help of three screws provided for the purpose of alignment.

An Adjustable Reflector Plate: is fitted on the side of the attachment whose angle is to be set at 45ᵒ or such that light should fall inside the Newton's lens.

The Condenser lens: is provided in front of the reflector.

2. Sodium Vapour lamp 35 watt ,Light Source

Sodium Lamp : 35W

Wavelength : 5893A’

3. Box with slits and for lamp

4. Sodium Lamp Transformer

Power Supply : 35W 


  • Newton Ring Microscope Compact type
  • Built in Newton Ring Assembly
  • Sodium vapour lamp +Box+Transformer

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