Question

Q 12) The unpolarized light falls from from the vacuum onto the glass plate at an angel of 60°. The

reflected beam is perfectly polarized. The speed of light in the material from which the plate is made

is (where c is the speed of light in a vacuum):

1) 0.6 c

2) 0.7 c

3) 0.8 c

4) 0.9 c

Answer 1

$$\frac{v}{c}=\frac{1}{\tan{60}}=0.6$$

Answer: 1) 0.6 c