Question

An object is placed at a distance of 50 cm from a concave mirror . it's real and inverted image is formed at a distance of 20 cm from the mirror . calculate the focal length of the mirror. ​

Answer 1

Answer:

Explanation:

u= -50 cm

v= 20 cm

1/v +1/u= 1/f

-1/50 + 1/20=1/f

(-2+5)/100=1/f

3/100=1/f

f= 33.33 cm