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JEE Main 2024 (Online) 27th January Morning ShiftMCQEasy📈 Topic in 31% papers+4−1
Ques. 1JEE Main 2024, 27 January (Morning Shift)

The radius of third stationary orbit of electron for Bohr's atom is R. The radius of fourth stationary orbit will be:

  1. 43R
  2. 169R
  3. 34R
  4. 916R

Answer

(2) 169R

Solution

Bohr radius: rn=0.529 n2Z Å rn n2

r4r3= 4232= 169

r4= 169R

Answer: (2)

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Ques. 2JEE Main 2024, 27 January (Evening Shift)

If Rydberg's constant is R, the longest wavelength of radiation in Paschen series will be 7R, where = .

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