![A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by](https://www.gkseries.com/blog/wp-content/uploads/2022/05/A-concave-mirror-of-radius-30-cm-is-placed-in-water.-Its-focal-length-in-air-and-water-differ-by.png)
Q. A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by
A. 15
B. 20
C. 30
D. 0
Answer: 0
A. 15
B. 20
C. 30
D. 0
Answer: 0
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