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Dual Nature of Radiation and Matter · Question 80

AIPMT 2001MCQEasy📈 Topic in 0% papers+4−1
1

The interplanar distance in a crystal is 2.8 10-8 m. The value of maximum wavelength which can be diffracted is

  1. 2.8 10-8 m
  2. 5.6 10-8 m
  3. 1.4 10-8 m
  4. 7.6 10-8 m

Answer

(2) 5.6 10-8 m

Solution

Bragg's law: 2d = n

is maximum when = 1 and n = 1:

⇒ max = 2d

= 2 2.8 10-8 m

= 5.6 10-8 m

Answer: (2)

AIPMT 2001

Keep practising — Dual Nature of Radiation and Matter

2

By photoelectric effect, Einstein proved

  1. E = h
  2. K.E. = 12 mv2
  3. E = mc2
  4. E = -Rhcn2
AIPMT 2000
3

Who evaluated the mass of electron indirectly with help of charge

  1. Thomson
  2. Millikan
  3. Rutherford
  4. Newton
AIPMT 2000

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