Question

What is monochromatic light?

Answer 1

Hint: In order to solve this question, we need to understand that usually, the light we see around us exists with multiple wavelengths or frequencies. Monochromatic light is light that has only one wavelength or frequency. Sunlight has multiple frequencies or wavelengths of light in them so they are called polychromatic light. In this type of question, we have to state the complete definition of the following thing that is asked in the question and had to explain about it. By stating the correct definition, we can get our answer.

Complete step by step solution:
Light of a single wavelength is known as monochromatic light. The term light signifies the visible and near-visible portions of the electromagnetic radiation. These radiations exist over a huge range of wavelengths, ranging from picometers to kilometres.
This range of wavelengths is collectively referred to as the electromagnetic spectrum. To obtain light of specific wavelength, one must use a form of light filter known as a monochromator to filter the unwanted wavelengths. Monochromators are generally variable so that different wavelengths can be selected at different times for different applications. Different chemicals will absorb or emit specific wavelengths of light, so this can be a diagnostic tool for chemical identification.
Photons propagate, or travel, as energy wave fronts of different lengths and levels of energy. Technologies using monochromatic light have a wide range of applications, from astrophysics and astronomy to forensic science.
A monochromatic light beam is characterized by its brightness or light intensity, direction of propagation, and colour (all visible characteristics) and by its state of polarization (an invisible characteristic).

Note:
It should be remembered that such type of questions can only be done by explaining the wholesome definition of the monochromatic lights. As explained, the full basics of such definitions can help you get a better understanding. The term monochromatic derives from the Greek words monos, meaning one or sole, and chromos, meaning colour. Sodium lamps are a common source of monochromatic light.