Concept explainers
Interpretation:
Light emitted from neon sign is differ from sunlight to be explained.
Concept introduction:
True neon signs are glow with red-orange colour. Neon sign has also come to perform collection of gas tubes that contain gases that display other colors.

Answer to Problem 38A
Neon light has certain visible colour but sunlight has all visible colour.
Explanation of Solution
Sunlight has all the colours of spectrum whereas neon light has few or certain visible colours. Highly unreactive group 18 elements are usually termed as noble gases and are used in neon signs.
Light of neon sign is created by passing electricity through a tube filled with neon gas.
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