According to Einstein, mass and energy are:
Correct answer: B. Directly proportional
- A. Inversely proportional
- B. Directly proportional
- C. Equal
- D. None of these
Explanation
Einstein's equation E=mc^2 implies a direct proportionality between mass and energy. It states that the energy (E) of an object is directly proportional to its mass (m) times the speed of light squared (c^2). This equation suggests that a small amount of mass can be converted into a large amount of energy, as observed in nuclear reactions.
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Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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