Question

a ray of light Is incident on the face of the prism at an angle 55degree with the normal. the ray is deviated by prism through 41 degree. find the angle of emergence if the refracting angle of prism is 61 degree​

Answer 1

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