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प्रश्न
Fill in the blank
Light consists of .............. colours.
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उत्तर
Light consists of seven colours.
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संबंधित प्रश्न
Fill in the blank.
Light gives us the sensation of ................
Is the moon a luminous object?
Explain the difference between a transparent, a translucent, and an opaque medium. Give two examples of each.
What do we call a substance through which light passes? Give an example of such a substance.
Can a transparent medium form an image? Explain your answer.
What do you understand by candle power?
Fill in the blank
Speed of light in vacuum is .................
Match the following
| Column A | Column B |
| 1. Transparent object | i. Football |
| 2. Eclipses | ii. Glass |
| 3. Translucent object | iii. Fluorescent tube |
| 4. Luminous object | iv. Tracing paper |
| 5. Non - luminous object | v. Shadows |
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?
Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the shirts in the image?
