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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 |
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उत्तर
| (a). A light ray passes from air to glass | (5). slows down |
| (b). A light ray passes from glass to water | (1) . speeds up |
| (c). Virtual image | (4). plane mirror |
| (d). Red rose | (2). reflects red light |
| (e). Red, green, and blue | (3). primary colours |
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संबंधित प्रश्न
Fill in the blank.
Light gives us the sensation of ................
Fill in the blank.
A medium which allows light to pass through it easily is called the ...................
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.
Name any four man made sources of light.
Tick the correct answer
Glass is
Fill in the blank
The brightness of light is measured in ...................
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.
A student observes a tree given in the following figure through a pin hole camera. Which of the diagrams given in the following figure (a) to (d), depicts the image seen by her correctly?
