Questions
A concave mirror is held in water. What should be the change in the focal length of the mirror?
a
Halved
b
Doubled
c
Remains the same
d
Increases exponentially
detailed solution
Correct option is C
No change. The focal length of a concave mirror does not depend on the nature of the medium. Therefore, the focal length of the mirror, even after holding it in water, will remain the same.Talk to our academic expert!
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The distance of a real object from the focus of a convex mirror of radius of curvature ‘a’ is ‘b’. Then the distance of the image from the focus is
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