In special theory of relativity, the law of conservation of energy and law of conservation of mass have been replaced with
Correct answer: B. Law of conservation of mass-energy
- A. The law of conservation of mass only
- B. Law of conservation of mass-energy
- C. law of conservation of energy only
- D. All of the above
Explanation
In the special theory of relativity, Albert Einstein showed that mass (m) and energy (E) are equivalent and can be converted into each other, as expressed by the famous equation:E = mc^2This means that the laws of conservation of energy and conservation of mass are no longer separate, but are combined into a single law: the law of conservation of mass-energy. This law states that the total mass-energy of a closed system remains constant over time.
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About Dawn of Modern Physics
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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