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If the radius of curvature of a concave mirror is 20 cm, what is its focal length? (2022)

Practice Questions

1 question
Q1
If the radius of curvature of a concave mirror is 20 cm, what is its focal length? (2022)
  1. 5 cm
  2. 10 cm
  3. 15 cm
  4. 20 cm

Questions & Step-by-step Solutions

1 item
Q
Q: If the radius of curvature of a concave mirror is 20 cm, what is its focal length? (2022)
Solution: The focal length (f) of a concave mirror is given by f = R/2, where R is the radius of curvature. Thus, f = 20 cm / 2 = 10 cm.
Steps: 4

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