Question

an object of 5.0 cm object is at 20.0 cm from a concave mirror of focal length 15.0 cm.at what distance from the mirror , should a screen be placed to get the sharp image ? also calculate size of the image.​

Answer 1

Answer:

Hi= 5cm

u = 20cm

f = - 15cm

(Given)

Explanation:

Now ,. 1/f = 1/v + 1/u

-1/15= 1/v + 1/20

1/v = -1/15 - 1/20

1/v = ( -4 - 3) ÷ 60

1/v = -7 ÷ 60

v = 60/ -7

【 v = - 8.57cm 】

hi/ho = -v/u

hi/5 = 8.57/20

hi = 8.57 × 5 / 20

hi = 8.57 /4

【hi = 2.14cm】

Hope it helps you.

PLEASE MARK ME BRAINLIEST..

Answer 2

Answer:

HEIGHT OF THE IMAGE IS 15 cm

REFER TO THE ATTACHMENT

MARK MY ANSWER AS BRAINLIEST

this is text book question