Question

An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm. Find the position, nature and size of the image formed.​

Answer 1

Answer:

use mirror formula i.e.

1/f = 1/v + 1/u

here

f = -20cm

u = -10cm

put the values...

we get,

-1/20 = 1/v -1/10

1/v = 1/10 -1/20

1/v = (2-1)/20

1/v = 1/20

so v= 20cm behind the mirror

magnification = -v/u = h i/h o

here the height of object is not given

so we can't find height of image i.e. the size..

nature of image formed is virtual and erect..

hope this will help you

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