Question

A ray of light is incident at 35o on a glass slab. Calculate the angle of refraction and deviation. Given refractive index of glass = 1.52.

Answer 1

Answer:

Given,

refractiveindexn=

sin(r

2

)

sin(i)

=1.52;.....(1)

i=r

1

;

now, reflected & refracted ray are mutually perpendicular

⇒(90−r

1

)+(90−r

2

)=90⇒r

1

+r

2

=90⇒i+r

2

=90

⇒r

2

=90−i;

substitutinginequation(1);

⇒

sin(90−i)

sin(i)

=

cos(i)

sin(i)

=tan(i)=1.52;

⇒i=tan

−1

(1.52)=56

o

40

′

Explanation:

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