Question

A crown glass prism of refracting angle 6º is to be used for deviation without dispersion with a flint glass of angle of

prism α. Given: for crown glass µr

= 1.513 and µv = 1.523, for flint glass µr

= 1.645 and µv = 1.665. Find α.​

Answer 1

Answer:

(μ

v

1

−μ

r

1

)a

1

=(μ

v

2

−μ

r

2

)a

2

ora

2

=

(1.665−1.645)

(1.523−1.513)

6

∘

=3

∘