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Question

A concave lens of focal length 30 cm is placed 30 cm in front of a plane mirror. Light from very far away source falls on the lens. The distance of final image from the mirror is

30 cm फोकस दूरी के एक अवतल लेन्स को एक समतल दर्पण के सामने 30 cm की दूरी पर रखा जाता है। बहुत दूर स्थित स्रोत से प्रकाश, लेन्स पर आपतित होता है। दर्पण से अन्तिम प्रतिबिम्ब की दूरी है

A
22.5 cm
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B
7.5 cm
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C
52.5 cm
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D
82.5 cm
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Solution

The correct option is B 7.5 cm
Solution

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