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प्रश्न
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
पर्याय
10 cm
5 cm
20 cm
15 cm
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उत्तर
20 cm
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संबंधित प्रश्न
Match the items given in Column I with one or more items of Column II.
| Column I | Column II | ||
| (a) | A plane mirror | (i) | Used as a magnifying glass. |
| (b) | A convex mirror | (ii) | Can form image of objects spread over a large area. |
| (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. |
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
Why is a hole burnt in the carbon paper?
Discuss the position and nature of image formed by a concave mirror when an object is moved from infinity towards the pole of mirror.
The image formed by a convex mirror is
Choose the correct alternative and rewrite the following:
Mirror used by a dental surgeon is ..........................
A ray of light is incident towards a plane mirror at an angle of 30° with the mirror surface. What will be the angle of reflection?
How tall does a mirror have to be to fit an entire person’s body?
What is “aperture”?
