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प्रश्न
Fill in the blank
A ............. is formed when the path of light is obstructed by an ..............
रिकाम्या जागा भरा
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उत्तर
A shadow is formed when the path of light is obstructed by an object
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संबंधित प्रश्न
Fill in the blank.
A medium which allows light to pass through it easily is called the ...................
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 |
How does light make an object visible?
What do we call an electric bulb producing light?
What is a transparent medium? Give two examples.
What do you understand by candle power?
Write true or false
The earth has its own light.
________ objects allow all the light to pass through them.
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 |
