Question

The angle of incident of a light ray is 30° and it takes refraction with an angle 60° , find the refractive index of the medium.

Answer 1

Answer:

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Answer 2

Answer:

angle of prism A is 30

angle of incidence is 60 degree

angle of deviation is 30 degree

i

1

+i

2

=A+δ

the angle of emegrance

i

2

=A+δ−i

1

=30+30−60=0

'the emergent ray

r

1

+r

2

=A

i

2

=0,r

2

=0

r

1

=A=30

0

using snells law

n=

sinr

1

sini

1

=

sin30

sin60

=1.732

since emergent ray is normal

δ=δ

m

=30

0

sin30/2

sin(30+30/2)

=1.732

Explanation:

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