CBSE Class 10 Science 2019 · Paper 31/5/2 · Question 3

Light - Reflection and Refraction 2 marks Medium

Draw a labelled ray diagram to show the path of the reflected ray corresponding to the ray which is directed towards the principal focus of a convex mirror. Mark the angle of incidence and angle of reflection on it.

Answer

The ray directed towards the focus is reflected parallel to the principal axis, with $∠ i = ∠ r$ .

Ray diagram (see the figure): the ray

A M

, directed towards the principal focus

F

behind the convex mirror, meets the mirror at

M

and is reflected along

M B

, parallel to the principal axis.

C M

produced to

N

is the normal at

M

. The angle of incidence

∠ i = ∠ A M N

and the angle of reflection

∠ r = ∠ N M B

are marked, with

∠ i = ∠ r

. The part of

A M

beyond the mirror, towards

F

, is dashed; arrows show the direction of both rays;

P

F

and

C

are labelled, with

F

midway between

P

and

C

🔒 Step-by-step solution

From the board paper

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CBSE Class 10 Science 2019 · Paper 31/5/2 · Question 3

Answer

From the board paper

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