Question

1.An object of size 2 cm is placed at 25 cm in front of a concave mirror. If the magnification produced by the mirror is 4, what is the size of the image ?


2.A concave mirror produces 10 cm long image of an object of height of 2 cm. What is the magnification produced?


answer in full steps please​

Answer 1

Answer:

Size of object h

o

=2cm

Size of the object h

i

=?

Focal length f=−12cm

Object distance u=−20cm

Image distance v=?

Using mirror formula

f

1

=

v

1

+

u

1

−12

1

=

v

1

+

−20

1

v

1

=

60

−5+3

v=−30cm

Magnification (M)=

h

o

h

i

=

u

−v

=

−20

30

=−1.5

h

i

=−1.5×2=−3cm

Image will be real, inverted and magnified.

Answer 2

For first one;

According to question we have given;

magnification (m) = 4

u = -25cm

We have to find size of image...

Let size of image be x.

For second one; from image

Explanation:

I hope it's helpful

Thanks