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Physics Unit And Measurement Difficulty: Medium

The SI unit of radioactivity is . . . . . . . .

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Linear momentum of a photon is_______________? Which one of the following statements is correct? The velocity of sound The rate of change of displacement with time is called as . . . . . . . . Assertion (A) Photoelectric effect demonstrates the particle nature of light. Reason (R) The number of photoelectrons is proportional to the frequency of light. Heat from the sun reaches earth by the process of