Question

refractive index 4/3. The
A point Source Of light is kept at a depth of h in water
RI =4/3. the radius of the circle at the surface of water through which light comes out is :

a.(3/√7)h
b.(√7/3)h
c.(√3/7)h
d. (7/√3)h

Answer 1

Answer:

Explanation:

sin90

∘

​

=μ

sinC=

μ

1

​

⇒

R

2

+H

2

​

R

​

=

4

3

​

Squaring, 16R

2

=9R

2

+9H

2

7R

2

=9H

2

⇒R=

7

​

3

​

h

solution