Q. A person standing 1 m in front of a plane mirror approaches the mirror by 40 cm. The new distance between the person and his image in the plane mirror is समतल दर्पण से 1 मीटर की दूरी पर खड़ा व्यक्ति दर्पण के 40 सें.मी. नज़दीक आता है. व्यक्ति और समतल दर्पण में व्यक्ति की छवि के बीच की नई दूरी क्या है?
(a) 60 cm
(b) 1.2 m
(c) 1.4 m
(d) 2.0 m
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The answer is (b) 1.2 m
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Answer:
1.2 m
Explanation:
image dist from him = 2× dist from mirror
= 2× 60 cm
= 120 cm = 1.2 m
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