If distance between virtual image from its real object is 60 cm in case of a concave mirror. Calculate focal length of concave mirror if image formed is 3 times magnified -
Text Solution
Verified by ExpertsThe correct answer is:
D
x + 3x = 60 ⇒ x = 15 cmu = – 15 cm
m = + 3
∴ m = 
⇒ + 3 = 
∴ 3f + 45 = f ⇒ f = – 22.5 cm
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