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प्रश्न
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
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उत्तर
Given:
Radius of curvature = 25 cm
To find: f =?
Solution:
f = `R/2`= `25/2`
f = 12.5 cm
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संबंधित प्रश्न
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| Column I | Column II | ||
| (a) | A plane mirror | (i) | Used as a magnifying glass. |
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| (c) | A convex lens | (iii) | Used by dentists to see enlarged image of teeth. |
| (d) | A concave mirror | (iv) | The image is always inverted and magnified. |
| (e) | A concave lens | (v) | The image is erect and of the same size as the object. |
| (vi) | The image is erect and smaller in size than the object. |
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