Question

12. If an object of 10 cm height is placed at a distance of 36 cm From a concave mirror of local length 12cm find the position, mature and hight of the image ​

Answer 1

Answer:

Object distance u=−36 cm

Focal length of concave mirror f=−12 cm

Using mirror formula :

v

1

+

u

1

=

f

1

Or

v

1

+

−36

1

=

−12

1

⟹ v=−18 cm

Magnification

h

o

h

i

=

u

−v

Or

10

h

i

=

−10

−(−18)

⟹ h

i

=−18 cm

Image formed is real and inverted.

Answer 2

Step-by-step explanation:

Object distance u=−36 cm

Focal length of concave mirror f=−12 cm

Using mirror formula : 1/v + 1/u = 1/f

Or 1/v + 1/−36 = 1/−12

⟹ v=−18 cm

Magnification hi/ho = −v/u

Or hi/10 = −(−18)/-10

⟹ hi =−18 cm

Image formed is real and inverted.