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प्रश्न
What do you understand by candle power?
उत्तर
To measure the brightness of light in comparison with the brightness of a candle. The unit of candle power is used.
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संबंधित प्रश्न
Write true or false of the following statement.
A shadow is formed because light travels in a straight-line path.
Is the moon a luminous object?
Write the names of some transparent objects.
Write the names of some cold light-emitting objects.
Tick the correct answer.
The natural source of light is
Fill in the blank
There are ........... and man-made ............ of light.
When light passes through a prism, it gets separated into ______ colours.
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.
What happens to light when it gets dispersed? Give an example.
Boojho made light from a laser torch fall on a prism. Will he be able to observe a band of seven colours? Explain with a reason
