Question

The diagram below shows the path taken by a monochromatic light ray traveling through three media. The symbols v1, λ1, and f1 represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

(A) λ1 < λ1 < λ1

(B) v2 < v3 < v1

(C) f2 < f1 < f3

(D) v3 < v1 < v2

(E) λ2 < λ1 < λ3

Answer 1

The correct option is: (E) λ2 < λ1 < λ3

Explanation:

More–Less dense bend away, Less–More dense bend towards. The more the bend, the ** the difference in n’* … this shows n2 > n1 > n3. More n means less speed, so v3 > v1 > v2 but this is not a choice. Speed goes with wavelength, the larger the speed the more the λ, so λ3 > λ1 > λ2