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Dual Nature of Radiation and Matter · Question 81

AIPMT 2000MCQEasy📈 Topic in 75% papers+4−1
1

By photoelectric effect, Einstein proved

  1. E = h
  2. K.E. = 12 mv2
  3. E = mc2
  4. E = -Rhcn2

Answer

(1) E = h

Solution

Einstein explained the photoelectric effect by assuming that light consists of quanta (photons), each of energy E = h .

His photoelectric equation K = h - 0 confirmed this particle nature of light.

Answer: (1)

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2

Who evaluated the mass of electron indirectly with help of charge

  1. Thomson
  2. Millikan
  3. Rutherford
  4. Newton
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