Question: If the focal length of a concave mirror is 10 cm, what is the radius of curvature?
Options:
5 cm
10 cm
15 cm
20 cm
Correct Answer: 10 cm
Solution:
The radius of curvature (R) is twice the focal length (f). Therefore, R = 2f = 2 * 10 cm = 20 cm.
If the focal length of a concave mirror is 10 cm, what is the radius of curvatur
Practice Questions
Q1
If the focal length of a concave mirror is 10 cm, what is the radius of curvature?
5 cm
10 cm
15 cm
20 cm
Questions & Step-by-Step Solutions
If the focal length of a concave mirror is 10 cm, what is the radius of curvature?
Step 1: Understand that the focal length (f) of a concave mirror is given as 10 cm.
Step 2: Know the relationship between the focal length and the radius of curvature (R). The formula is R = 2f.
Step 3: Substitute the given focal length into the formula. So, R = 2 * 10 cm.
Step 4: Calculate the result. R = 20 cm.
Focal Length and Radius of Curvature – The relationship between the focal length (f) and the radius of curvature (R) of a concave mirror, where R = 2f.
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