Question

Describe how a monochromater may be used to scan a sample. What are the physical characteristics of a grating monochromator responsible for determining spectral resolution?

Answer 1

Answer: As the name suggests monochromator, its allows only light of single wavelength by removing unwanted wavelength from the source beam light. A monochromator is composed of two slits(for entry and exit ) and diffraction element which may be a prism or diffraction grating.

light containing different wavelengths broken down in their respective wavelengths when entering through a monochromator. Breaking down of light into its constituent wavelength is done with the help of prism. Similarly, a diffraction grating can be used to change the color of light extracted through slit by the means of rotation.

A monochromator is comprising of the dispersive element, entrance slit and mirror to obtain parallel beam similar to sunlight and an exit slit and mirror to extracted out the monochromatic light.