Atoms And Nuclei Question 434

Question: The wavelength of light emitted from second orbit to first orbits in a hydrogen atom is

Options:

A) 1.215×10−7m

B) 1.215×10−5m

C) 1.215×10−4m

D) 1.215×10−3m

Show Answer

Answer:

Correct Answer: A

Solution:

  • Energy radiated E=10.2,eV=10.2×1.6×10−19J

⇒ E=hcλ
Þ λ=1.215×10−7m

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