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In a double convex lens, if the focal length is 15 cm, what is the power of the lens? (2022)

Practice Questions

1 question
Q1
In a double convex lens, if the focal length is 15 cm, what is the power of the lens? (2022)
  1. +6.67 D
  2. +7.5 D
  3. +10 D
  4. +15 D

Questions & Step-by-step Solutions

1 item
Q
Q: In a double convex lens, if the focal length is 15 cm, what is the power of the lens? (2022)
Solution: Power (P) of a lens is given by P = 1/f (in meters). Here, f = 15 cm = 0.15 m, so P = 1/0.15 = +6.67 D.
Steps: 0

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