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Q: The Quantum Theory of light was given by–
  • A. Einstein
  • B. Planck
  • C. Newton
  • D. Faraday
Correct Answer: Option B - Max Planck gave quantum theory of light. The energy (E) of a quanta is given by hv, where h is the plank constant and  is the frequency of incident light .Energy of a quanta = hv = hc/λ
B. Max Planck gave quantum theory of light. The energy (E) of a quanta is given by hv, where h is the plank constant and  is the frequency of incident light .Energy of a quanta = hv = hc/λ

Explanations:

Max Planck gave quantum theory of light. The energy (E) of a quanta is given by hv, where h is the plank constant and  is the frequency of incident light .Energy of a quanta = hv = hc/λ