A virtual image is formed 24.5 cm from a concave mirror having a radius of curva

Question

Explanation / Answer

apply for concave mirror 1/f = 1/u + 1/v

u = object distance,

v= image distance

and f = focal length = R/2 = 45/2 = 22.5 cm

so 1/u = 1/f -1/v

u = vf/(v-f)

u = 24.5* 22.5/(24.5+22.5)

u = 11.72 cm
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magnification m = -v/u = -24.5/11.72 = 2.09

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