The Mystery of Aurora

Although they look elegant and calm, aurorae are produced when a large number of charged particles undergo collision while being trapped in Earth’s magnetic field.

This splendid display of colours and appearance of dancing lights is fascinating, and equally puzzling. These haunting lights are a form of intense space weather, a result of the atmosphere shielding the Earth against fierce solar particles that would otherwise make our planet uninhabitable. Millions and millions of electrically charged particles in the solar wind wash over Earth and smash into upper atmospheric gases. The energy from each collision is released as photons – particles of light. This causes the particles to glow.

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A Physical Pendulum Problem

About 2 weeks ago, Former MIT Professor Walter H. G. Lewin posted a Physics problem on his YouTube channel as a part of his series of problems for the viewers of his channel. This question was divided into two parts – the first one, which was quite simple and a trickier sequel to it. The videos have been embedded and the solution is derived along the problem.

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Derivation Of Formulas For Energy

I had a tough time deriving formulas for mechanical energy when given in school as assignment or as a question in exams. I don’t want any of you reading this to experience the same feeling. So, I would like to show you how we derive the conventional formulas for potential and kinetic energies to be later used in problems.

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Newton’s Color Disc

A Newton disc is a disc with segments in rainbow colours. When the disc is rotated, the colours fade to white; In this way Isaac Newton demonstrated that white light is a combination of the seven different colours found in a rainbow. A Newton Disc can be created by painting a disc with the seven different colours. A combination of red, green and blue in the circular disc will yield the same result. This is due to the phenomenon called persistence of vision. It can easily be made at home using a card board piece It was an important discovery …

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