Question

Show how light reflected from a transparent medium gets polarized. Hence deduce Brewster’s Law.


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Answer 1

Hello friend.

Brewster’s law, relationship for light waves stating that the maximum polarization (vibration in one plane only) of a ray of light may be achieved by letting the ray fall on a surface of a transparent medium in such a way that the refracted ray makes an angle of 90° with the reflected ray. The law is named after a Scottish physicist, Sir David Brewster, who first proposed it in 1811.

The figure shows a ray of ordinary (nonpolarized) light of a given wavelength incident on a reflecting surface of a transparent medium (e.g., water or glass). Waves with the electric field component vibrating in the plane of the surface are indicated by short lines crossing the ray, and those vibrating at right angles to the surface, by dots. The plane of incidence (AON) is the plane that contains the incident ray and the normal (ON, a line perpendicular to the surface) to the plane of the surface such that they intersect at the surface. Most of the waves of the incident ray will be transmitted across the boundary (the surface of the water or glass) as a refracted ray making an angle r with the normal, the rest being reflected. For a specific angle of incidence (p), called the polarizing angle or Brewster’s angle, all reflected waves will vibrate perpendicular to the plane of incidence (i.e., to the surface), and the reflected ray and the refracted ray will be separated by 90°. Brewster’s law also states that the tangent of the angle of polarization, p, for a wavelength of light passing from one substance to another is equal to the ratio of the refractive indices, n1 and n2, of the two contacting mediums: tan p = n2/n1.

For a light wave passing from air (n1 = 1.00) to glass (n2 = 1.50), the polarizing angle, p, is calculated to be 56°19′.

hope it's helpful for you..

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Answer 2

"Light reflected from a transparent medium gets polarized", Brewster's Law

Explanation:

• As you know, the bounced beam is polarized but all of it isn’t. If it is in the level of a reflection, it performs light polarized at 90 degrees to that level. That is more suitable to bounce.
• When you finish your daylight at any special angle, it produces a large influence on how polarized the bounce is going to be. Thus, Brewster’s Law is yonder to assist us in explaining how it differs with angle.
• As per the Brewster’s Law, the greatest polarization becomes a place when the angle is 90 degrees in within the returned ray and refracted ray. This law was called after the famous Scottish Physicist, Sir David Brewster. It was introduced in the year 1811. Moreover, even the polarization phase is Brewster’s phase.

To learn more:

state and prove Brewster's law - Brainly.in

https://brainly.in/question/1218601

State and arrive at brewster's Law in polarisation - Brainly.in

https://brainly.in/question/7790956