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प्रश्न
Fill in the blank
Speed of light in vacuum is .................
रिकाम्या जागा भरा
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उत्तर
Speed of light in vacuum is 300000 km/sec
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संबंधित प्रश्न
Fill in the blank.
A medium which allows light to pass through it easily is called the ...................
Name two natural sources of light.
Differentiate between the luminous and non-luminous bodies. Give two examples of each.
Write the names of some transparent objects.
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 |
Write true or false
The stars have no light.
Light is a form of ______.
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.
Amount of light entering into the eye is controlled by ______.
What is light?
