Which of the following expressions gives the linear magni...
Which of the following expressions gives the linear magnification produced by a concave mirror of radius of curvature r, if U and V are the object and image distances respectively?
Vr - 1
2Vr - 1
Ur - 1
2Ur - 1
Correct answer is B
F = r2 and v = mu
F = UVU+V
r2 = U×muU+mu
r2 = mu2u(1+m)
r2=mu1+m
r2=v1+m
2vr=1+m
m=2vr−1
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