Method to produce coherent sources

 

There are two different methods of producing coherent sources:

1. By division of the wavefront 
• Young's Double-Slit Experiment: A single source of monochromatic light illuminates a barrier with two closely spaced slits. The light emerging from these two slits acts as coherent sources.
• Fresnel's Biprism Method: A single wavefront is refracted through two adjacent, acute-angled prisms to produce two coherent virtual sources
2. By division of the amplitude
• Newton's Rings: Light reflects back and forth between a spherical lens and a flat glass plate, dividing the amplitude to produce a coherent interference pattern. 

• Michelson's Interferometer: A beam splitter divides the amplitude of a light beam into two paths, which are then reflected by mirrors and recombined to create interference.