Question

How you determine the wavelength of monochromatic light using newton's ring?

Answer 1

Explanation:

The wavelength λ of light is given by the formula: Where, Dn+m = diameter of (n+m)th ring, Dn = diameter of nth ring, m = an integer number (of the rings) R = radius of curvature of the curved face of the plano-convex lens.

Answer 2

The wavelength of monochromatic light using newton's ring is:

• The wavelength of a monochromatic source by using Newton’s Ring experiment.

• The key idea behind Newton’s ring experiment is the thin film formation between a plane-convex lens and a glass plate.

• The wavelength of the monochromatic light and the refractive index of a given transparent liquid medium present in the wedge-shaped film can be calculated by studying the ring pattern.

• The redistribution of energy by superposition of light waves is called as interference.

• A thin equi-convex lens of focal length 4 m and refractive index 1.5 is placed on an optically flat glass plate.

• Using a light of wavelength 546 nm, Newton's rings are viewed normally by reflection.