Question

. The expression:- angle of deviation = 2i – A is applicable when the prism is in________​

Answer 1

Hey there this is your answer...!!!

A=Prism angle, δ=Angle of deviation, i

1

=Angle of incidence, i

2

=Angle of emergent.

In the case of minimum deviation,∠r

1

=∠r

2

=∠r

A=∠r

1

+∠r

2

SO, A=∠r+∠r=∠2r

∠r=

2

A

Now, again

A+δ=i

1

+i

2

(∵ In the case of minimum deviation

i

1

=i

2

=i and δ=δ

m

)

So, A+δ

m

=i+i=2i

Now, i=

2

A+δ

m

Now, from snell's rule,

μ=

sin r

sin i

μ=

sin

2

A

sin

2

A+δ

m

hope this helps you...!!!!

Answer 2

Answer:

gud eve friend.....

.....