Question

Q2
2. If a ray of light is travelling from a medium having refractive index 4y to a
medium having refractive index 42. then match the following. [ ]
Column - 1
Column - II
i) M =12
p) Snell's law
ii) M, sin 8, = hy sin 02
9) light ray bends away from normal
iii) Hy> H2
r) light ray bends toward normal
iv) My <H2
s) light ray goes undeviated
The correct match is
1) i - s, ii - p. iii- q. iv - r
2) i-q, ii - s, iii - r. iv - p
3) i - s, ii- q. iii - p. iv - r
4) i-r, ii - q, iii - p, iv - S
А
OB
Ос
OD​

Answer 1

Explanation:

Correct option is

B

2cos

−1

2

μ

From Snell's Law, μ=

sinr

sini

As r=

2

i

So, μ=

sin

2

i

sini

=

sin

2

i

2sin

2

i

cos

2

i

=2cos

2

i

⇒cos

2

i

=

2

μ

⇒

2

i

=cos

−1

2

μ

⇒i=2cos

−1

2

μ

.