Question

[SolveLancer Test]Consider three statement about the concave mirror:
(i) The focal length of mirror will change if mirror is placed in oil.
(ii) If incident ray is parallel to principal axis then reflected ray retraces the path.
(ii) The focal length of a mirror does not depends on its radius of curvature.​

Answer 1

Answer:

in concave mirror:

the focal length of mirror will change if mirror is placed in oil due to refraction of light rays by the the oil