Question

An object is placed at 60cm in front of a concave mirror of focal length 20cm . State the nature and size of the image relative to tgat of the object​

Answer 1

Answer:

Given,

Object Distance (u) = 60 cm (negative)

Focal Length (f) = 20 cm (negative)

1/f = 1/u + 1/v

-1/20 = -1/60 + 1/v

-1/20 + 1/60 = 1/v

(-3+1)/60 = 1/v

-2/60 = 1/v

-1/30 = 1/v

-30 cm = v

The Distance of Image from concave mirror is 30 cm. The Image will be real, diminished in size as compared to object.

I hope this helps.

Answer 2

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30 cm