Question

In case of refraction through a glass slab Incident ray is parallel to the refracted ray Incident ray is parallel to the emergent ray Angle of incidence is equal to the angle of refraction Angle of refraction is equal to the angle of emergence

Answer 1

Answer:

ANSWER

If the angle of incidence and angle of emergence of a light ray falling on a glass slab are given then by applying snell’s law we can get

sinr

sini

=

n

1

n

2

When the light travels from the air to glass

sinr

sini

=μ

g

a

Now the light travels withing the glass the angle of incidence is equal to the angle of reflection

When light goes out of the glass into air then according to snells law

sine

sinr

=

n

2

n

1

sine

sinr

=μ

a

g

On multiplying the above two equation we get

sine

sini

=1

sini=sine

i=r

Hence the angle of incidence is equal to the angle of emergence and the rays are parallel to each other.

Answer 2

Answer:

Option D is the answer

Explanation:

Angle of refraction is equal to the angle of emergence.