OPTICS

1. Answer the following problems below:

A ray of light enters a pane of glass at 50°to the horizontal. If the index of refraction of glass is 1.5, what will be the angle of the refracted ray be?

Hint: Medium 1 = air ; Medium 2 = glass; i = 50°: Required: Br?

2. A step-index fiber has a core index of refraction of n₁= 1.425. The cut-off angle for light entering the fiber from air is found to be 8.50⁰.

a. What is the numerical aperture of the fiber?

b. What is the index of refraction of the cladding of this fiber?

c. If the fiber were submerged in water, what would be the new numerical aperture and cut off angle:

(Hint: see numerical aperture problems.)

Plss pa answer it correctly I just need it po plsss​ kAsi wala po akong makuhang sagot natama :(​