Question

If refractive indices for water and glass are 4/3 and 5 / 3 respectively and light is tending to go from
glass to water, the critical angle is​

Answer 1

Answer:

Hey Mate i m answering your question.

It is given that the refractive indices of water 4/3 and of glass is 5/3 .

by the formula

sini/sinr=4/3/5/3

=4/5

=0.2

Explanation:

thank u..

Answer 2

The critical angle is sin⁻¹(4/5).

Given,

The refractive indices of water and glass are 4/3 and 5/3 respectively.

The light is entering from glass to water.

To Find,

The critical angle.

Solution,

The denser medium is glass,

$u_{g} = 5/3$

The rarer medium is water,

$u_{w} = 4/3$

Now, applying the snell's law

$u_{g}*sin i_{c} = u_{w}*sinr$

Since angle r = 90

So,

5/3*sin $i_{c}$ = 4/3

sin $i_{c}$ = 4/5

$i_{c}$ = sin⁻¹(4/5)

Hence, the critical angle is sin⁻¹(4/5).

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