Which property of sodium is being used in street lights ?

Which property of sodium is being used in street lights ?

  1. A

    It shows photoelectric effect

  2. B

    It has low melting point

  3. C

    Sodium atom emits photons in the yellow region of visible spectrum, due to electrically stimulated transitions

  4. D

    Sodium vapours show golden colour

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    Solution:

    The property of sodium atom to emit photons in yellow region of visible spectrum, due to electrically stimulated electron transitions is used in street lights.

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