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A concave mirror of focal length 20cm (in air) is immersed in water (
detailed solution
Correct option is A
For mirror nature does not change. f = 20 cmTalk to our academic expert!
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The focal length of spherical mirror is given by when R is the radius of curvature of the mirror. For a given spherical mirror made of steel the focal length is f= 24.0 cm. What is the new focal length if temperature is increased by 50°C?
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