Q.

A source emits light of wavelength 4700Å, 5400 Å and 6500 Å. The light passes through red glass before being tested by a spectrometer. Which wavelength is seen in the spectrum

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a

6500 Å

b

5400 Å

c

4700 Å

d

All the above

answer is A.

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Detailed Solution

Only red colour will be seen in spectrum.
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A source emits light of wavelength 4700Å, 5400 Å and 6500 Å. The light passes through red glass before being tested by a spectrometer. Which wavelength is seen in the spectrum