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Physics Guru is an online education and competitive examinations preparation portal founded by Manish Verma, an IIT Madras alumnus, providing learning resources for competitive examinations.

The emphasis is on conceptual understanding, analytical thinking and problem solving rather than simply memorising formulas and standard methods.

The objective is to help students understand what they are learning and develop the ability to solve problems they have not seen before.

Q & A

Q: A nuclear fusion lab requires very high temperature for the fusion reaction to takes place. Mr X says, "The temperature at Sun's surface is around 6000 K. We can use advanced lenses/mirrors to focus Sun's rays and get temperature much higher than 6000 K. Mr Y disagrees.

Who is right, Mr X or Mr Y and why?

A: Mr X is wrong as his statement does not take into account the second law of thermodynamics. It is not possible to get higher temperature than 6000 K as heat cannot flow from low temperature to high temperature.