Who is attributed to the discovery of ‘Quantum theory of light?
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Max Planck
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Albert Einstein
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Isaac Newton
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Galileo
A
Correct answer
Explanation
Max Planck is credited with discovering the quantum theory of light in 1900 through his work on blackbody radiation. He introduced the concept that energy is emitted in discrete packets called 'quanta.' Einstein later expanded quantum theory with his work on the photoelectric effect, but Planck founded it.