Question

In Snell’s window the angular diameter is
a) Equal to critical angle
b) Twice of the critical angle
c) Half of the incident angle
d) Twice of the refracted angle​

Answer 1

Answer:

If you take nw=1.333 (fresh water), then the critical angle θc=48.6°, so Snell's window subtends an angle of 97.2° at the camera. For sea water, nw=1.339, and 2θc=96.6°. Refractive index is a function of the wavelength (or colour, or frequency) of the light.

answer: twice of the retracted angel.