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प्रश्न
Answer the following.
Name some sources of light that are not hot.
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उत्तर
Moon, jugnu.
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संबंधित प्रश्न
Fill in the blank.
Light travels in a ................. path.
What do we call a substance through which we cannot see light? Give an example of such a substance.
Write the names of some cold light-emitting objects.
Tick the correct answer.
A tube light is a
Fill in the blank
There are ........... and man-made ............ of light.
Answer the following.
What is meant by luminous intensity? What is one lumen?
State Rayleigh’s law of scattering.
State whether the following statement is True or False.
An object can be seen only if it emits light
Light is a form of energy and it travels in a straight line.
Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the shirts in the image?
