CBSE Class 10 Science 2017 · Paper 531 · Question 31

Light - Reflection and Refraction 1 mark Medium

A student carries out the experiment of tracing the path of a ray of light through a rectangular glass slab for two different values of angle of incidence

∠ i = 3 0^{\circ}

and

∠ i = 4 5^{\circ}

. In the two cases the student is likely to observe the set of values of angle of refraction and angle of emergence as :

(a) $∠ r = 3 0^{\circ}$ , $∠ e = 2 0^{\circ}$ and $∠ r = 4 5^{\circ}$ , $∠ e = 2 8^{\circ}$
(b) $∠ r = 3 0^{\circ}$ , $∠ e = 3 0^{\circ}$ and $∠ r = 4 5^{\circ}$ , $∠ e = 4 5^{\circ}$
(c) $∠ r = 2 0^{\circ}$ , $∠ e = 3 0^{\circ}$ and $∠ r = 2 8^{\circ}$ , $∠ e = 4 5^{\circ}$
(d) $∠ r = 2 0^{\circ}$ , $∠ e = 2 0^{\circ}$ and $∠ r = 2 8^{\circ}$ , $∠ e = 2 8^{\circ}$

Answer

(c)

∠ r = 2 0^{\circ}

∠ e = 3 0^{\circ}

and

∠ r = 2 8^{\circ}

∠ e = 4 5^{\circ}

🔒 Step-by-step solution

From the board paper

CBSE Class 10 Science 2017 · Paper 531, Question 31 — all 36 questions with answers →

CBSE Class 10 Science 2017 · Paper 531 · Question 31

Answer

From the board paper

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