Higher Physics Lab Light & Optics

NEWTON'S RINGS APPARATUS SK008

 

Exp-1 To determine the wavelength of sodium light.
Exp-2 To determine the refractive index of a liquid by using Newton’s rings apparatus.
Exp-3 To find the radius of curvature of planoconvex lens using Newton’s rings experiment, given λ=5893A°.
Exp-4 To find the thickness of a thin sheet of paper (air wedge experiment)..

  • All the components including sodium lamp, microscope, power supply & optics are housed in single piece compact body (stand alone setup).
  • Optical glass plate mounted at 45° (no adjustment required).
  • Smooth moving collimating facility.
  • Quick adjustment, good quality, well defined distinct fringes.
  • Interference.
  • Newton’s rings.
  • 4Refractive index.
  • Air-wedge method.
  • 4Radius of curvature.
Newton's Rings

Principle and Working :
A plano-convex lens is placed with its convex surface on the optically plane glass plate so as to enclose a thin film of air of varying thickness between the lens and the plate. Light from an extended monochromatic source is converted into a parallel beam of light by using a convex lens of short focal length and made to fall on an optically plane glass plate inclined at an angle of 45° to the vertical, where it gets reflected on to the Plano-convex lens. The wavelength of monochromatic light source is determined from the radii of the interference rings.

Contents:

Cat No. Item Name Qty.
SW916 Newton’s ring apparatus 1
SP821 Spherometer 1
R7708 Plano convex lens with plane glass plate 1

 

NEWTON'S RINGS APPARATUS SK029

 

Exp-1 To determine the wavelength of sodium light.
Exp-2 To determine the refractive index of a liquid by using Newton’s rings apparatus.
Exp-3 To find the radius of curvature of planoconvex lens using Newton’s rings experiment, given λ=5893A°.
Exp-4 To find the thickness of a thin sheet of paper (air wedge experiment).

  • Modular approach, components can be used in other experiments.
  • Economy model.
  • Interference.
  • Newton’s rings.
  • 4Refractive index.
  • Air-wedge method.
  • 4Radius of curvature.
Newton's Rings

Principle and Working :
The light from monochromatic source is made to fall on an optically plane glass plate inclined at an angle of 45° to the vertical, where it gets reflected on to the plano-convex lens. The wavelength of monochromatic light source is determined from the radii of the interference rings.

Contents:

Cat No. Item Name Qty.
SL269 Newton’s rings unit 1
SL930 Sodium light source 1
SPA13 Bridge type microscope 1
R6118 Wooden block 1
SP821 Spherometer double disc 1
R7708 Plano convex lens with plane glass plate 1

Light & Optics Experiments

 


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