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प्रश्न
Answer the following.
Distinguish between transparent, translucent, and opaque objects.
उत्तर
- Transparent objects: Those objects through which light can pass easily are called transparent objects, e.g. Water, glass, air.
- Translucent object: The object through which light can pass partially are called translucent object, e.g. tracing paper, waxed paper.
- Opaque object: The objects which do not allow the light to pass through are called opaque objects, e.g. wood.
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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 |
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
Tick the correct answer.
Light causes
Tick the correct answer.
Light is a font of
When a ______ object comes in the way of light, light passes ______ it.
Light is a form of ______.
Speed of light in air is 3 × 108 m s–1 and the refractive index of a medium is 1.5. Find the speed of light in the medium.
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 |
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
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?
