4 a A plane transmission grating having 5000 lines per cm is

Last updated: 6/21/2023

4 a A plane transmission grating having 5000 lines per cm is being used under normal 8 2 Marks incidence of light 1 What is the longest wavelength of light for which a spectrum can be seen 2 What is the highest order spectrum that can be seen for the light of wavelength 6000 3 If the width of opaque parts is double than that of transparent parts of the grating then which orders of spectra will be absent 4 If 90 of the width of the ruled width of the grating is covered what will happen to the observed spectrum b Two nicols are first crossed and then one of them is rotated through 60 Calculate the percentage of incident light transmitted