Which source is associated with a line emission spectrum? (a) Electric fire (b) Neon street sign (c) Red traffic light (d) Sun

Answer: (b). A line spectrum comes from excited free atoms in a low-pressure gas. A neon sign is a gas discharge tube, so it gives bright lines. Electric fire, filament lamps and the Sun are hot dense sources giving continuous spectra. So the answer is (b) Neon street sign.

Which source is associated with a line emission spectrum? | NEET 1993 (AIPMT)

Q60NEET 1993 · AIPMTEasy

Hydrogen Spectrum & Spectral Series

Which source is associated with a line emission spectrum?

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Answer: (b)

A line spectrum comes from excited free atoms in a low-pressure gas.
A neon sign is a gas discharge tube, so it gives bright lines.
Electric fire, filament lamps and the Sun are hot dense sources giving continuous spectra.
So the answer is (b) Neon street sign.

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