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Which source is associated with a line emission spectrum?

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in Physics – Class 12 by (135k points)
Which source is associated with a line emission spectrum?

(a) Electric fire

(b) Neon street sign

(c) Red traffic light

(d) Sun

This question was posed to me by my college director while I was bunking the class.

Asked question is from Atomic Spectra in chapter Atoms of Physics – Class 12

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Right option is (b) Neon street sign

The explanation: Neon street sign gives a line emission spectrum. When neon atoms gain enough energy to become excited, light is produced. Atom releases a photon when it returns to a lower energy state. Therefore, the source associated with a line emission spectrum is the neon street sign.

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