Question

A source emits light of wavelength 4700?, 5400 ? and 6500 ?. 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

Answer 1

All the above is the answer