Question

An object placed at 20 cm from a concave mirror forms a real inverted image at a distance of 40 cm from a concave mirror. Find the focal length of the concave mirror?​

Answer 1

Answer:

hey!

here's your answer,

u= (-20 cm)

v= (+40 cm)

f= ?

1/v + 1/u = 1/f

1/40 - 1/20 = 1/f

(1-2)/40 = 1/f

-1/40 = 1/f

f = -40 cm

hope it helps you

Answer 2

Answer:

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