Suppose there are two twin brothers, one of them remains on earth while the other goes for a space travel at a very high speed (comparable to the speed of light). The astronaut comes back from…

Time is an obvious physical quantity that can be felt in daily life but defining it remains a challenge even for the physicists of current times. A famous scientist once said ‘time is something that flows…

Michelson interferometer, as it is famously called, is used in the Michelson-Morley experiment. Earth moves around the sun at a speed of around 108000 km/h so when a light beam is shone along the direction…

In the previous essay we have discussed about relative motion where Mr. A was chasing a car. Mr. A, moving at 3 km/h (w.r.t. reference), found the car’s speed is 7 km/h when the car was…

Place yourself in a moving car, when you see the person next to you, he appears to be at rest, but for someone standing on the footpath the same person appears to be moving at certain…

Electrical heating appliances like heaters and geysers are some of the luxuries offered by science. All of us use them in daily life and a day without these appliances is a nightmare in the cold countries…

Mathematics is omnipresent and the significance of it has its mark in every branch of science. Physics is one such area where progress would be unimaginable without the role of mathematics. Predicting the behavior of complex systems…

Life is all about work, but what really does the term work refer to. In physics, work is defined as an activity that involves a force and movement in the direction of the force that is…

Radiant energy is usually carried by the electromagnetic radiation. The S.I. unit of radiant energy is the joule (J) just as is the case with the rest of the forms of energy. The electromagnetic radiation is…