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Which of the following is the principle of Flame emission photometers?

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Which of the following is the principle of Flame emission photometers?

(a) Radiation is absorbed by non-excited atoms in vapour state and are excited to higher states

(b) Medium absorbs radiation and transmitted radiation is measured

(c) Colour and wavelength of the flame is measured

(d) Only wavelength of the flame is measured

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Asked question is from Flame Emission Photometers in portion Colorimetry and Spectrometry of Analytical Instrumentation

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Correct answer is (c) Colour and wavelength of the flame is measured

For explanation: In Flame emission photometers, colour and intensity of the flame are measured. The intensity of light emitted when sample is introduced into the flame is also measured.

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