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प्रश्न
What is a virtual image?
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उत्तर
When the rays of light reflecting from an object appear to meet in a virtual form, then the images formed in this way are called virtual images.
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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. |
Which type of mirror can form a real image?
A ray of light is incident on a plane mirror at an angle of 30°. What is the angle of reflection
Explain the following terms :
Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.
Select the correct option:
Looking into a mirror one finds her image diminished, the mirror is:
What is the relation between focal length and radius of curvature of a concave mirror?
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
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?
In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm. The focal length of the objective, when the angular magnification of the telescope is 2, will be ______.
