Question : The laser is a beam of radiation which are
Option 1: non-coherent and monochromatic
Option 2: coherent and monochromatic
Option 3: non-coherent and non-monochromatic
Option 4: coherent and non-monochromatic
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Correct Answer: coherent and monochromatic
Solution : The correct option is coherent and monochromatic .
The term " laser", which stands for "Light Amplification by Stimulated Emission of Radiation", refers to the coherent (in-phase) radiation beam produced. When the radiated waves' amplitudes are summed in a coherent light source, a powerful radiation beam is produced. Typically, it only generates one or two wavelengths. Monochromatic radiation refers to a single wavelength.
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