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Question
The spectrum obtained from a sodium vapour lamp is an example of -
The spectrum obtained from a sodium vapour lamp is an example of -
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Solution
The correct option is C emission spectrum
When light from a source is examined in a spectroscope, we observe the emission spectrum of the source.
The sodium vapour spectrum consists of few isolated bright lines. Each bright line corresponds to a particular wavelength. It is emitted by the atoms in the gaseous state.
When light from a source is made to pass through an absorbing substance and then examined in a spectroscope, we observe the absorption spectrum of the substance.
A band spectrum is emitted by chemical compounds in the vapour state.
A continuous spectrum consists of a wide range of unseparated wavelengths.
Hence, option (C) is the correct answer.
When light from a source is examined in a spectroscope, we observe the emission spectrum of the source.
The sodium vapour spectrum consists of few isolated bright lines. Each bright line corresponds to a particular wavelength. It is emitted by the atoms in the gaseous state.
When light from a source is made to pass through an absorbing substance and then examined in a spectroscope, we observe the absorption spectrum of the substance.
A band spectrum is emitted by chemical compounds in the vapour state.
A continuous spectrum consists of a wide range of unseparated wavelengths.
Hence, option (C) is the correct answer.
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