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Structure of Atoms and Nuclei — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsStructure of Atoms and Nuclei1 Mark
MCQ
When an electron in Hydrogen atom revolves in stationary orbit, it
  • ✓
    does not radiate light though its velocity changes
  • B
    does not radiate light and velocity remains unchanged
  • C
    radiates light but its velocity is unchanged
  • D
    radiates light with the change of energy
✓

Answer

Correct option: A.
does not radiate light though its velocity changes
(a) : Electrons can revolve around the nucleus in stationary orbits only which are non-radiating. Energy is radiated only when an electron jumps from an outer stationary orbit to inner stationary orbit. Velocity of electron changes while revolving in stationary orbits but energy remains constant.

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