A hair is placed at one edge between two flat glass plates.When this arrangement is illuminated with yellow light of wavelength (l = 600 nm),a total of 121 dark bands are counted starting at the point of contact between the plates.How thick is the hair? (1 nm = 10^-9 m)

Question

Quizplus · Accepted Answer

The correct answer is A because the thickness of the hair can be calculated using the formula t = (m + 1/2) * l / 2, where m is the number of dark bands counted, l is the wavelength of light used, and t is the thickness of the hair. In this case, m = 121, l = 600 nm, and t = (121 + 1/2) * 600 nm / 2 = 3.6 x 10^-5 m.

A Hair Is Placed at One Edge Between Two Flat