Question

2.
]
a) 8 =(x-1) A b) 8 = (x+1) A c) 8=(A-1) u d) 8 =(A+1) 4
If the refracting angle of a prism is 60° and minimum deviation is 30°, the angle of incidence will be
b) 45°
[ ]
A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is
to (3/4) of the angle of prism. The
a) 30°
c) 60°
d) 90°
3.
is eaus​

Answer 1

Explanation:

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

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