Question

The image shows the path of incident rays to a concave mirror.
If the focal length of the mirror is 20 cm, the range of formation of image would be,
A. Between 0 to 20cm
B. Between 20 cm to 40 cm C. Between 0 to infinity
D. Between 0 to 40 cm

Answer 1

Answer:

between 0to 20

Explanation:

If image position does not change even when mirror is removed it means image formed by lens is formed at centre of curvature of spherical mirror.

Radius of curvature of mirror = 80−60=20cm

⇒focal length of mirror f=10cm for virtual image, object is to be kept between focus and pole.

⇒ maximum distance of object from spherical mirror for which virtual image is formed, is 10cm.

Answer 2

Answer:

If it helps mark me as brainliest.

Explanation:

The object is beyond C. So, the image will be between F and C, i.e. 20 cm to 40 cm.

B is correct