22. The Laser is a beam of radiations which are A.Non-coherent and monochromatic B.Coherent and monochromatic C.Non-coherent and non-monochromatic D.Coherent and non-monochromatic
Option B Solution: Laser, an acronym for Light Amplification by Stimulated Emission of Radiation, creates a radiation beam that is coherent (in-phase). In a coherent light source, the amplitude of the radiated waves is added and results in a radiation beam of great intensity. It normally produces only one or two wavelengths. The single wavelength is called monochromatic radiation.
