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A concave mirror has a focal length of 20 cm. What is the radius of curvature of the mirror? (2021)

Practice Questions

1 question
Q1
A concave mirror has a focal length of 20 cm. What is the radius of curvature of the mirror? (2021)
  1. 10 cm
  2. 20 cm
  3. 30 cm
  4. 40 cm

Questions & Step-by-step Solutions

1 item
Q
Q: A concave mirror has a focal length of 20 cm. What is the radius of curvature of the mirror? (2021)
Solution: The radius of curvature (R) is twice the focal length (f). Therefore, R = 2f = 2 * 20 cm = 40 cm.
Steps: 0

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