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What is the focal length of a concave lens with a focal point at -15 cm?

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Description

Question: What is the focal length of a concave lens with a focal point at -15 cm?

Options:

  1. 15 cm
  2. -15 cm
  3. 30 cm
  4. -30 cm

Correct Answer: -15 cm

Solution: 

The focal length of a concave lens is negative, so it is -15 cm.

Practice Questions

1 question
Q1
What is the focal length of a concave lens with a focal point at -15 cm?
  1. 15 cm
  2. -15 cm
  3. 30 cm
  4. -30 cm

Questions & Step-by-step Solutions

1 item
Q
Q: What is the focal length of a concave lens with a focal point at -15 cm?
Solution: The focal length of a concave lens is negative, so it is -15 cm.
Steps: 4

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