Question

A parallel beam of light falls on a glass
slab at an angle of incidence of 60° and
suffers reflection as well as refraction.
The refractive index of glass is 3. The
ratio of the widths of the reflected and
refracted beams is:

Answer 1

Explanation:

Answer:

PHYSICS

A ray of light is incident at an angle i on a glass slab of refractive index μ. The angle between reflected and refracted light is 90

o

. Then the relationship between i and μ is.

December 26, 2019avatar

Jenny Pàgarē

SHARE

ANSWER

Let the angle of reflection and refraction be r

1

,r

2

respectively.

Since angle between reflected and refracted ray is 90

∘

,

r

1

+r

2

=90

∘

.

From law of reflection, r

1

=i

From Snell's law,

sini=μsinr

2

=μsin(90

∘

−r

1

)

=μcosr

1

=μcosi

⟹tani=μ

hope it helps you pls mark me as brainlist answer .