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If the radius of curvature of a concave mirror is 40 cm, what is its focal length?

Practice Questions

1 question
Q1
If the radius of curvature of a concave mirror is 40 cm, what is its focal length?
  1. 10 cm
  2. 20 cm
  3. 30 cm
  4. 40 cm

Questions & Step-by-step Solutions

1 item
Q
Q: If the radius of curvature of a concave mirror is 40 cm, what is its focal length?
Solution: The focal length f of a mirror is given by f = R/2. Thus, f = 40 cm / 2 = 20 cm.
Steps: 4

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