Question

Refractive index of water with respect to air is 1.33 and that of glassis 1.52.
(iii) The refractive index of glass is 1.52. What is the meaning of this statement​

Answer 1

Answer:

• The meaning of refractive index of glass is 1.52 is that the speed of light in glass 1/1.52 times the speed of light in air/vaccum ,i.e., speed of light in glass .

→ Refractive Index = Speed of Light in Air/Speed of light in Glass

•n = c/v

where,

n denote refractive index

c denote speed of light in vacuum or air.

v denote speed of light in glass

Substitute the value we get

→ 1.52 = 3×10⁸/v

→ 1.52 × v = 3 × 10⁸

→ v = 3 × 10⁸/1.52

→ v = 1.97 × 10⁸ m/s

Answer 2

Answer:

Refractive index = speed of light in air /speed of light in gas

↦n =c/v

where,

• n denote refractive index
• c denote speed of light in vacuum or air
• v denote speed of light in glass

substitute the value we get

⇒1.52 =3 ×10^8/v

⇒1.52×v =3 × 10^8

⇒v =3 × 10^8/1.52

⇒v = 1.97 × 10^8 m/s

Thanks!!