(a) Draw the given diagram and label the following in the diagram. (i) Incident ray (ii) Refracted ray (iii) Emergent ray (iv) Angle of refraction (v) Angle of deviation (vi) Angle of emergence (b) The refractive index of diamond is 2.42. What is the meaning of this statement in relation to the speed of light ?

Foundation

Physics Foundation

refraction from lens

Refraction and parallel slab

Light

Question

(a) Draw the given diagram and label the following in the diagram.
(i) Incident ray
(ii) Refracted ray
(iii) Emergent ray
(iv) Angle of refraction
(v) Angle of deviation
(vi) Angle of emergence
(b) The refractive index of diamond is 2.42. What is the meaning of this statement in relation to the speed of light ?

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Given : Refractive index of diamond is 2.42

We know,

μ = \frac{c}{v}

Hence,

Refractive index of diamond = \frac{Speed of light in air}{Speed of light in diamond}

⇒ Speed of in air = 2.42 × Speed of light in diamond

This means the speed of light in air is 2.42 times the speed of light in diamond.