JEE PYQ: Ray Optics Question 13
Question 13 - 2021 (26 Feb Shift 2)
A point source of light S, placed at a distance 60 cm infront of the centre of plane mirror of width 50 cm, hangs vertically on a wall. A man walks infront of the mirror along a line parallel to the mirror at a distance 1.2 m from it (see in the figure). The distance between the extreme points where he can see the image of the light source in the mirror is ____ cm.
Show Answer
Answer: (150)
Solution
From similar triangle IMP and IQR: $\frac{QR}{25} = \frac{180}{60} \Rightarrow QR = 7$ F.O.V. $= 2 \times 75 \Rightarrow 150$ cm
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