Question
Download Solution PDFThe focus of a convex mirror is at a distance of 30 cm from its pole. Its centre of curvature will be at a distance of ________ from the focus.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is '30 cm'.
Key Points
- A ray of light is made incident on a convex mirror, parallel to its principal axis.
- After reflection, it will pass through the principal focus for point Q(given in question).
- The relation between the focal length (f) and radius of curvature (R) of a Concvex mirror is that the focal length is equal to half of the radius of curvature i.e. R=2f.
R = 2 x 30 = 60cm
The center of curvature will be at a distance equal to the focus length from the focus. i.e CF = R - f = 60- 30 = 30 cm.
Therefore, 'option 3' is correct.
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