Question

the refractive index of water air media is 4/3 and glass air media 3/2 then a)the critical angle for Water air media is more than glass air media b)the critical angle for Water air media is less than glass air media the critical angle for glass air media is greater than water air media
​

Answer 1

Answer:

hey mate here is your answer...

Explanation:

When a light ray travels from denser to rarer medium, then the angle of incidence for which the refracted ray becomes parallel to the interface(∠r=90

∘

), is known as critical angle for that pair of media.

Here, the denser medium is Glass μ

g

=

3

5

&

the rarer medium is water μ

w

=

3

4

Applying Snell's law at the interface of the two media, we have

μ

g

×Sin i

c

=μ

w

×Sin r

From definition, we know,

∠r=90

∘

⇒μ

g

×Sin i

c

=μ

w

×Sin 90

∘

⇒

3

5

×Sin i

c

=

3

4

⇒Sin i

c

=

(

3

5

)

(

3

4

)

⇒Sin i

c

=

5

4

⇒i

c

=Sin

−1

(

5

4

)

Hence, the correct answer is OPTION A

Answer 2

Answer:

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Explanation:

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