Question

Choose the correct answers
The unit of refractive index is
b) m/s2
a) m/s
d) No units
10.
d) 10ʻm
c) 10'm
b) 10m
b) diamond
d) Rainbow
c) Kym
1 micrometer
a) 10 m
Which one is different.
a) Optical fibre
c) Mirage
Speed of light in vaccum.
a) 3x10 m/s
n, sini-n sinr is called ............ law
a) Hygen's
12.
d) 310m/s
c) 3x10ʻm
b) 2x10 m/s
13.
c) Fermat's rote
d) Snells
b) Newton's
14.
The critical angle of diamond is........
d) 26.40
a) 24°
b) 24.4°
c) 23.4​

Answer 1

Answer:

d) no units

1 micro meter=10‐⁶ metre

Snell's law

14)2.42