Question

the distance between an object and the screen is 75cm.when a convex lens of focal length 12cm is placed in between the object and screen,magnification of the real image formed can be

Answer 1

In a convex lens
If the image is real,
U= -75
F= + 12
V= ?
Applying lens formula
1/V -1/U =1/F


——->1/v +1/75 = 1/12
1/v=1/12-1/75 => 75/900-12/900
Therefore v= 900/63
W.K.T
M= v/u
Therefore
M=14.28/-75

M=-60.72


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