question_answer

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            [MP PMT 1995]

A)            \[6500\,\,{\AA}\]               

B)            \[5400\,\,{\AA}\]

C)            \[4700\,\,{\AA}\]               

D)            All the above