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Object placed in front of a concave mirror At distance x cm from pole gives 3times magnification if it is moved at distance x+5 cm magnification of image becomes 2 focal length of mirror is

Bhagyashree , 6 Years ago
Grade 12th pass
anser 1 Answers
Arun

Last Activity: 6 Years ago

Dear student
 
m1 = -f + u/-f = 3
 
2 f = 3u
 
also
m2 = -f / -f + (u+5)  = 2
 
now solve both equation,
 
f = – 30 cm
 
hope it helps

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