Question

If focal length =f=-10 cm
object distance = u = -30 cm
height of Image of h, =-5 cm
Image distance = v= ?
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Answer 1

Answer:

By mirror formula,

=>1/f=1/v+1/u.

=>-1/10=1/v+(-1/5) .

=>1/v=-1/10+1/5 .

=>1/v=(-1+2)/10 .

=>1/v=1/10 .

So , Image distance = v= 10 cm .