Assignment

1. Find out the wavelengths of spectral lines in:
   1. Mercury spectrum
   2. Hydrogen spectrum
   3. Neon spectrum
2. Find out the number of lines per meter of the grating, using green light in the mercury spectrum.
3. Find out the number of lines per meter of the grating, using red light in the hydrogen spectrum.
4. What is the use of a diffraction grating?
5. What is the difference between a transmission grating and a reflection grating?