Question

If the refractive index of a medium is 1.3,

Answer 1

Explanation:

see the above attachment to solve the question and get the answer.

hope this helps you.

Answer 2

Answer:

We know that refractive index of medium is n=

speedoflightinvacuum

speedoflightinvaccum

n=

v

c

,

c is the velocity of light in vacuum and v is velocity in that medium.

For water :

n=

v

c

1.3=

2.25×10

8

c

c=2.925×10

8

m/s

For glass :

c=2.925×10

8

m/s

n

glass

=

v

glass

c

1.5=

v

glass

2.925×10

8

v

glass

=1.95×10

8

m/s