SELECT * FROM question_mgmt as q WHERE id=3740 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=261 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)
The radius of curvature of a spherical mirror is 20 cm. What is its focal length?
Given,
Radius of curvature, R = 20 cm
Radius of curvature of a spherical mirror = 2 × Focal length (f)
R = 2f
by putting the values we get
The focal length of the given spherical mirror is 10 cm.
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