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The spectrum ...

Question

The spectrum of radiation emitted by a substance that has absorbed energy is called emission spectrum.

A

True

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B

False

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Solution

The correct option is A
True

What is an emission spectrum exactly?

When a sample is subjected to heating or irradiation, it absorbs radiation or energy and gets excited. As the sample gives up the absorbed energy, the wavelength (or frequency) of the radiation emitted is recorded.

The arrangement of these radiations in the order of increasing wavelengths or decreasing frequencies is called emission spectrum.

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The spectrm of radiation emitted by a substance that has absorbed energy is called emission spectrum.

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λ_{m}

at which the intensity of the emitted radiation is maximum and then using Wiens displacement law which states that

λ_{m}

=

b where b is a constant called Wiens constant and the above relation is called Wiens Displacement Law which states that as the temperature increases, the maximum intensity of emission shifts (or is displaced) towards the shorter wavelengths. The value of constant b has been found experimentally to be 2.89 x 10

^{- 3}

mK .
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