Question

In a Newton's ring experiment, the lens (of radius R) is lifted slowly from the glass plate by a distance 'd'. The radius of the dark fringe (for light of wavelength A) of order m now becomes​

Answer 1

Answer:

Condition for formation of bright and dark fringes: When a parallel beam of monochromatic light is incident normally on a combination of a plano-convex lens C and a glass plate P, as shown in fig. ... 1(b)) with the point of contact between the lens and the plate at the center. These rings are known as Newton's rings.

Answer 2

Explanation:

a Newton's ring experiment, the lens (of radius R) is lifted slowly from the glass plate by a distance 'd'. The radius of the dark fringe (for light of wavelength A) of order m now becomes