Ray Optics And Optical Instruments
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ray-optics-and-optical-instruments Question 10
Question: Q. 3. A concave (or convex mirror) is held under water. Will its focal length change?
U
Show Answer
Solution:
Ans. No, The focal length of small aperture mirror is half of its radius. It does not depend upon the refractive index of the surrounding medium.
$1+1$
Commonly Made Error
- Many candidates gotconfused mirror with lens and wrote the answer ‘yes’.
