Question

if ri from air to glass is 3/2 and from air to water is 4/3 then find the ratio of focal lengths of glass lens in water and in air.

Answer 1

Answer:

2.25×10^8 m/s.

Brainly Solutions:

The speed of light in vacuum or air is about c = 300 000 km/s = 3.0×10^8 m/s.

In glass is about vg = 200 000 km/s = 2.0×10^8 m/s.

In water is about vw = 225 000 km/s = 2.25×10^8 m/s.

So the speed of light decrease as it leaves air to water or to glass and as it leaves water to glass.

Answer 2

Mark as a brainlist dood

Absolute ri r given

Given A glass=3/2

A water=4/3

Glass N water=?

Solution _________

V1=3/2

V2=4/3

1N2 =v1 /v2

=3/2÷4/3

=3/2×3/4

=9/8

REFRACTIVE INDEX OF WATER QUTH RESPECT TO GLASS IS 9/8