A concave lens has a focal length of 50 cm. Its power is
Options
- A. +2 D
- B. -2 D
- C. +0.5 D
- D. -0.5 D
- E. None of the above
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Correct Answer (Detailed Explanation is Below)
B. -2 D
Detailed Explanation
For a concave lens, focal length is negative. f = -0.50 m, therefore P = 1/f = -2 D.Share On
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BPSC TRE 4 General Science practice set 1