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प्रश्न
Match the following.
| Group A | Group B |
| (a) Mirror | (1) Non-luminous |
| (b) Firefly | (2) Inverted image |
| (c) Pinhole camera | (3) Reflection |
| (d) Moon | (4) Luminous |
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उत्तर
| Group A | Group B |
| (a) Mirror | (3) Reflection |
| (b) Firefly | (4) Luminous |
| (c) Pinhole camera | (2) Inverted image |
| (d) Moon | (1) Non-luminous |
संबंधित प्रश्न
Match the following
| (a). A light ray passes from air to glass | (1) . speeds up |
| (b). A light ray passes from glass to water | (2). reflects red light |
| (c). Virtual image | (3). primary colours |
| (d). Red rose | (4). plane mirror |
| (e). Red, green, and blue | (5). slows down |
Write true or false of the following statement.
A shadow is formed because light travels in a straight-line path.
What do we call a substance through which we cannot see light? Give an example of such a substance.
What do you understand by candle power?
Tick the correct answer.
Substance which don’t allow light to pass through them,
Fill in the blank
There are ........... and man-made ............ of light.
Answer the following.
List four natural sources of light.
A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is ______.
State whether true or false. If false, correct the statement.
If a ray of light passes obliquely from one medium to another, it does not suffer any deviation.
Observe the picture given in the following figure carefully.
A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?
