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Chaitanya Borah Grade: 11
        

the distance of an object placed before a concave mirror is 16cm from one focus and distance of its image 100cm from the focus. find the focal length and the magnification of the mirror.

7 years ago

Answers : (1)

Chetan Mandayam Nayakar
312 Points
										

let f be focal length.  1/(f+16) + 1/(f+100) = 1/f,     upon simplifying, we get f2 = 1600. f>0, thus f=40cm


magnification = u/v = 56/140 =2/5 =0.4


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7 years ago
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