Question

An object of height 10 cm is placed at a distance of 20 cm from a concave mirror. A real

image is formed at a distance of 30 cm from the mirror.

a)Find the magnification?

b)What is the height of the image?

c)Find the focal length of the mirror?


Please help me​

Answer 1

Answer:mark as brainlist plz

given

h1=10cm

u= -20cm

v= 30cm

f = ?

v = ?

Explanation:

1/f = 1/v + 1/u

= 1/30 + 1/-20

= 10/600

f = --60cm

m = h1/h2 = -v/u

h2 = h1 x -v/u

= 10 x -30/-20

h2 = -15cm

the image is real and inverted and 1.5 times of object.