Question

What is S and P Polarized light?

Answer 1

Hint: To answer this question will first begin with the definition of polarization. Understanding the concept of light polarization is critical for a wide range of optical applications. Optical design frequently focuses on light wavelength and intensity while ignoring polarization.

Complete answer:
Polarization – Light is an electromagnetic wave, and its electric field oscillates perpendicular to its propagation direction. If the direction of this electric field fluctuates randomly over time, light is said to be unpolarized. Unpolarized light is produced by many common light sources, including sunlight, halogen lighting, LED spotlights, and incandescent bulbs.

Polarized light is defined as having a well-defined electric field direction.
“A laser is the most common source of polarized light.”
1. S polarized light – Polarised light with an electric field that is perpendicular to the plane.
2. P polarized light – Polarised light with a parallel electric field direction to the plane of incidence on the given device

The opposite definition can be found in the context of diffraction gratings. In this case, "s" still means perpendicular, but not to the plane of incidence, but to the grating lines. So, in the case of s polarization, the electric field vector is perpendicular to the lines, i.e., it lies in the plane of incidence.

Note: When a laser beam's polarization is vertical, i.e., perpendicular to the lab floor, it is referred to as s polarized. However, it is preferable to limit the terms s polarization and p polarization to situations in which the polarization direction with respect to a plane of incidence is important.