A ray of light is incident on a denser medium at an angle $60^{\circ}$ . The angle of refraction is different for different mediums for the same angle of incidence i.e. $60^{\circ}$ . In which medium the speed of light is slowest?

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Solution

The correct option is C
3

Snell's law:

$\frac{S i n i}{S i n r}$ = $\frac{c}{v}$ (since first medium is air)

For medium 1: $v_{1}$ = $\frac{\sqrt{3} c}{2 S i n i}$

For medium 2: $v_{2}$ = $\frac{c}{\sqrt{2} S i n i}$

For medium 3: $v_{3}$ = $\frac{c}{2 S i n i}$

Therefore speed of light is minimum in medium 3

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A ray of light is incident on a medium at an angle $60^{\circ}$ .

The angle of refraction is different for different mediums for an angle of incidence $= 60^{\circ}$ .

In which medium the speed of light is slowest?

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A ray of light is incident on a denser medium at an angle 60∘. The angle of refraction is different for different mediums for the same angle of incidence i.e. 60∘. In which medium the speed of light is slowest?

The correct option is C 3 Snell's law: SiniSinr = cv (since first medium is air) For medium 1: v1 = √3c2Sini For medium 2: v2 = c√2Sini For medium 3: v3 = c2Sini Therefore speed of light is minimum in medium 3

A ray of light is incident on a denser medium at an angle $60^{\circ}$ . The angle of refraction is different for different mediums for the same angle of incidence i.e. $60^{\circ}$ . In which medium the speed of light is slowest?