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प्रश्न
If the radius of curvature of a concave mirror is 20 cm, its focal length is:
पर्याय
10 cm
20 cm
40 cm
80 cm
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उत्तर
10 cm
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संबंधित प्रश्न
Study the following diagram and select the correct statement about the device 'X' :
(A) Device 'X' is a concave mirror of radius of curvature 12 cm
(B) Device 'X' is a concave mirror of focal length 6 cm
(C) Device 'X' is a concave mirror of focal length 12 cm
(D) Device 'X' is a convex of mirror of focal length 12 cm
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