Home
Class 10
PHYSICS
Rays from Sun converge at a point 15 cm ...

Rays from Sun converge at a point `15 cm` in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object ?

A

15 cm in front of the mirror

B

30 cm in front of the mirror

C

Between 15 cm and 30 cm in front of the mirror

D

More than 30 cm in front of the mirror

Text Solution

Verified by Experts

The correct Answer is:
B
The distance of the circus infinite as compared to the radius of curvature of concave mirror so light rays from sun incident parallel all the rate coverage at the principal focus to the focal length 16 cm.
in case of the concave mirror the size of image and object will be seen if the object is placed at 2f. Hence, in this case object must be placed at 2f or `2xx 15`= 30 cm
Promotional Banner

Similar Questions

Explore conceptually related problems

What is the distance of an object from a concave mirror of focal length 20 cm so that the size of the real image is three times the size of the object ?

Where should an object be placed in front of a convex lens to get a real to get real image of the size of the object ?

The radius of curvature of a concave mirror is 50 cm. Where should an object be held from the mirror so as to form its image at infinity?

A concave mirror has focal length 15 cm. Where should an object be placed in front of the mirror so that the image formed is three times the size of the object? (i) 7.5 cm (ii) 10 cm (iii) 17.5 cm (iv) 20 cm