Question

If the
angle of minimum deviation is 30degree and refractive index is 1.5, calculate the angle of the prism.
​

Answer 1

Answer:

Let δ

m

be the angle of minimum deviation A=δ

m

A=δ

m

μ=

sin(

2

A

)

sin

2

(A+δ

m

)

1.5=

sin(

2

A

)

sin(

2

A+A

)

1.5=

sin(

2

A

)

sin2(

2

A

)

=

sin(

2

A

)

2sin

2

A

cos

2

A

1.5=2cos

2

A

0.75=cos

2

A

2

A

=cos

−1

(0.75)

2

A

=41

o

A=82

o