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प्रश्न
Fill in the blank.
The sun is a ............... source of light.
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उत्तर
The sun is a natural source of light.
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संबंधित प्रश्न
Fill in the blank.
Light gives us the sensation of ................
What do we call a substance through which light passes? Give an example of such a substance.
Tick the correct answer.
A tube light is a
Fill in the blank
Speed of light in vacuum is .................
In going from a rarer to denser medium, the ray of light bends ______.
Match the following.
| 1. | Ratio of height of image to height of object. | Concave mirror |
| 2. | Used in hairpin bends in mountains. | Total internal reflection |
| 3. | Coin inside water appearing slightly raised. | Magnification |
| 4. | Mirage | Convex mirror |
| 5. | Used as Dentist’s mirror. | Refraction |
a) Draw ray diagrams to show how the image is formed using a concave mirror, when the position of object is:
- at C
- between C and F
- between F and P of the mirror.
b) Mention the position and nature of image in each case.
Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli are, respectively
What is light?
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?
