Light that is traveling in water (with an index of...

Name: Problem 47, Chapter 33: Principles of Physics
Uploaded: 2022-03-21T12:49:39-08:00
Duration: 1 min 31 s
Channel: Khoobchandra Agrawal
Description: Light that is traveling in water (with an index of refraction of 1.33) is incident on a plate of glass (with index of refraction 1.71). At what angle of incidence does the reflected light end up fully polarized?

Light that is traveling in water (with an index of refraction of 1.33) is incident on a plate of glass (with index of refraction 1.71). At what angle of incidence does the reflected light end up fully polarized?

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Key Concepts

Brewster's Angle

Brewster's angle is the specific angle of incidence at which light reflected from a surface becomes completely linearly polarized. At this angle, the reflected and refracted rays are perpendicular to one another, and the reflection eliminates one of the polarization components. This concept is fundamental in understanding how light interacts with surfaces and is widely used in optical applications such as polarizing filters.

Index of Refraction

The index of refraction is a measure of how much the speed of light is reduced when it travels through a medium compared to its speed in a vacuum. This property determines how light bends, or refracts, at the interface between two media with different indices of refraction, and plays a key role in calculating the angle at which phenomena like total polarization, as seen in Brewster's angle, occur.

Polarization by Reflection

Polarization by reflection refers to the process by which light becomes partially or completely polarized when it reflects off a surface. At a particular angle of incidence, known as Brewster's angle, the reflected light is fully polarized because only one polarization component is efficiently reflected, while the component parallel to the plane of incidence is minimized or completely eliminated.

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