by Rajan Gupta | Aug 8, 2020 | Articles
The refraction of light may be defined as the phenomenon of change in direction of light, when it passes from one medium to another. The cause for refraction of light when it passes through one medium to another is the difference of velocity of light in different...
by Rajan Gupta | Aug 8, 2020 | Articles
Did you ever notice that drops of water are always spherical in shape? Have you ever seen insects floating over surface of water? These phenomenon takes place due to an interesting property of liquids called surface tension. Surface tension may be defined as the...
by Rajan Gupta | Aug 8, 2020 | Articles
The minimum temperature at which a substance starts to burn is called its ignition temperature. Different fuels have different ignition temperatures. Some fuels have low ignition temperature and some have high ignition temperature. The fuels that have low ignition...
by Rajan Gupta | Aug 8, 2020 | Articles
Light is a form of energy. Light helps us to see object .But it is not visible to us. We can define light as the form of energy which causes in us the sensation of sight. Light always travels from one point to another in straight lines. The light rays travel from one...
by Rajan Gupta | Aug 8, 2020 | Articles
An electromagnet is a temporary magnet in which a long insulated copper wire is wrapped on a soft iron core in the form of a helix. Thus, an electromagnet is a solenoid having a core of soft iron core at its centre. When electric current in passed through it, it...
by Rajan Gupta | Aug 8, 2020 | Articles
Primary Colours The primary colours of light are red, green, and blue. These colours are also called basic colours of light. the reason for considering red, green and blue as primary colours is that all the other colours are made by mixing primary colours in suitable...
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