radius of curvature of a spherical mirror is 30cm. it's focal length is ___cm a) 30 b) 15 c) 60 d) 20
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radius of curvature of a spherical mirror is 30 cm. it's focal length is 15
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Answer:
b)15
Explanation:
radius of curvature of a spherical mirror is 30cm. it's focal length is 15 cm .
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