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Question

# A straight line graph is obtained by plotting sine of angle of incidence versus sine of angle of refraction. The slope of this graph represents :

A
Velocity of light
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B
Refractive index
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C
Gravitational
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D
None of these
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Solution

## The correct option is D Refractive indexThe straight line graph between angle of incidence and angle of refraction shows that θ1∝θ2, or sinθ1∝sinθ2From this we can say sinθ1sinθ2=constantwhere θ1= angle of incidence and θ2= angle of refraction.Now by Snell's law of refraction, we know that constant is nothing but refractive index of medium, hence the slope of graph would be refractive index.

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