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प्रश्न
A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Where is his image and how wide is the image of his mouth?
उत्तर
The image formed is 2m behind the mirror and 5 cm wide. The reason being, a plane mirror forms an image of the same size as the object, and at the same distance behind the mirror as that of the object from the mirror.
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संबंधित प्रश्न
What is refraction of light?
The letter F is placed in front of a plane mirror:
How would its image look like when seen in a plane mirror?
What are the important differences between looking at a photograph of your face and looking at yourself in a plane mirror?
Which type of reflection of light leads to the formation of images?
The figure given alongside shows the image of a clock as seen a plane mirror. The correct time is:
Figure
(a) 2.25
(b) 2.35
(c) 6.45
(d) 9.25
A ray of light travelling in glass emerges into air. State whether it will bend towards the normal or away from the normal.
When a light ray passes from air into glass, what happens to its speed? Draw a diagram to show which way the ray of light bends.
The laws of reflection hold true for:
Twinkling of stars and Mirage are the two phenomena occurring due to refraction.
Match the following:
| Column I | Column II | ||
| 1. | r > 90 | a. | Light gazes at the surface of separation between the two modes. |
| 2. | r = 90 | b. | No refraction. |
| 3. | r < 90 | c. | Refracted ray away from the normal |
