Question

Physics For Scientists And Engineers (9th Edition)

In chapter 37,problem 63AP

Q:

In a Newton's-rings experiment, a plano-convex glass (n = 1.52) lens having radius r = 5.00 cm is placed on a flat plate as shown in Figure P37.63 (page 1158). When light of wavelength A = 650 nm is incident normally, 55 bright rings are observed, with the last one precisely on the edge of the lens.

(a) What is the radius R of curvature of the convex surface of the lens?

(b) What is the focal length of the lens?

In the solution step 3, it states "The order of the ring m=55-1", and i don't understand the meaning of this calculation.

Answer 1

Please “LIKE” the solution if this answer is helpful for you.

If you have any doubt please ask me in comment before rate.