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प्रश्न
From among the following objects, list out the opaque, translucent, and transparent bodies in the space provided below:
A glass strip, an ordinary paper, greased paper, tracing paper, polythene sheet, wooden piece, steel plate, glycerine, kerosene oil, mustard oil, grounded glass, stone, book, water, and milk.
Opaque Transparent Translucent
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उत्तर
|
Opaque |
Transparent | Translucent |
| an ordinary paper | A glass strip | greases paper |
| wooden piece | kerosene oil | kerosene oil |
| steel plate | water | polythene sheet |
| stone |
|
glycerine |
| book |
|
mustard oil |
| milk | grounded glass |
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संबंधित प्रश्न
Match the following columns
| Column A | Column B |
| a. Wooden block | i. new moon's day |
| b. Sun | ii. rectilinear propagation of light |
| c. Umbra | iii. opaque body |
| d. Eclipse | iv. luminous body |
| e. Solar eclipse | v. complete dark park |
What do we call an electric bulb producing light?
What do we call a substance through which we cannot see light? Give an example of such a substance.
What do we call a substance through which light passes? Give an example of such a substance.
Fill in the blank
A ............. is formed when the path of light is obstructed by an ..............
Fill in the blank
Light consists of .............. colours.
Answer the following.
Differentiate between luminous and non-Luminous objects.
A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is ______.
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 |
Why are traffic signals red in colour?
