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प्रश्न
Write true or false
The earth has its own light.
पर्याय
True
False
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उत्तर
False
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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 |
Tick the correct answer
Glass is
Fill in the blank
The brightness of light is measured in ...................
Answer the following.
What is meant by luminous intensity? What is one lumen?
When light passes through a prism, it gets separated into ______ colours.
Write whether of the following objects are luminous or non-luminous.
| Object | Luminous/Non-luminous |
| A book | |
| A burning candle | |
| A wax cloth | |
| A pencil | |
| A pen | |
| A light bulb | |
| A tyre | |
| A torch |
_______ is the natural source that stimulates sight and makes things visible.
A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is ______.
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
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?
