Mass and energy are related to each other by:
Correct answer: B. Einstein's law
- A. Newton's law
- B. Einstein's law
- C. Coulomb's law
- D. All of these options are correct
Explanation
Option A) Newton's law is incorrect because Newton's laws of motion deal with the behaviour of objects under the influence of external forces and do not relate to the mass-energy equivalence.Option B) Energy (E) equals mass (m) times the speed of light (c) squared, or E = mc². The equation revealed that mass and energy are different forms of the same thing. This is Einstein's law. Option C) Coulomb's law is incorrect because Coulomb's law deals with the electrostatic force between charged particles and does not relate to the mass-energy equivalence.Option D) All of these options are correct is incorrect because only option B) Einstein's law is correct.
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About Quantum Theory and Radiation
Quantum theory treats electromagnetic radiation as packets of energy called photons, with energy proportional to frequency through E equals hf. The topic covers Planck's hypothesis, photon momentum, the photoelectric effect, threshold frequency, work function and wave particle duality, distinguishing quantised energy exchange from classical continuous radiation.
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