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प्रश्न
Tick the correct answer.
A tube light is a
विकल्प
Hot source
Cold source
Incandescent source
None of these
MCQ
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उत्तर
Hot source
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संबंधित 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 |
Can light travel in vacuum?
Fill in the blank.
A medium which allows light to pass through it easily is called the ...................
Select the correct alternative.
The luminous body is
Write the names of some cold light-emitting objects.
Tick the correct answer.
Light is a font of
Answer the following.
What is light?
Answer the following.
What is meant by luminous intensity? What is one lumen?
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 |
What is light?
