Explain total internal reflection, Electrical Engineering

Assignment Help:

Explain Total internal reflection?

The refractive index of a medium is defined as the ratio of velocity of light in vacuum to the velocity of light in that medium

nx = C/V

where nx is the refractive index of the medium, C is the velocity of light in vacuum and V is the velocity of light in in which medium.
Consider two mediums of refractive indices n1 and n2, where n1>n2. When a ray travels from n1 (denser) to n2 (rarer), the refracted ray bends more away from the normal. This is display below:

1239_total internal reflection.png


According to Snell's law of refraction
n1 sin O1 = n2 sin O2
sin O1/ sin O2= n2/n1
when we make the angle of incidence as some Oc such that O2=900. This angle Oc is known as Critical angle. The condition is shown below:

704_total internal reflection 1.png

When the incident angle increases from Oc, the light is reflected back within the originating dielectric medium. This phenomenon is known as total internal reflection. Therefore it may be observed that total internal reflection occurs at the interface among two dielectrics of differing refractive indices, while light is incident on the dielectric of lower index from the dielectric of higher index. The total internal reflection is shown below:

2284_total internal reflection 2.png

The light ray passing by the optic fibre follows the total internal reflection at the core-cladding interface.


Related Discussions:- Explain total internal reflection

Find the total line current flowing through feeder, Q. Athree-phase, 60-Hz ...

Q. Athree-phase, 60-Hz substation bus supplies two wye-connected loads that are connected in parallel through a three-phase feeder that has a per phase impedance of 0.5 + j2 . Loa

Wcdma, what is that mean and explain

what is that mean and explain

Crt and cro, working principle of crtand block diagram of cro

working principle of crtand block diagram of cro

Commutator, explan Two segment and four sagment commutator action

explan Two segment and four sagment commutator action

Hall effect is associated with which material, Hall Effect is associated wi...

Hall Effect is associated with (A) Conductors. (B) Semiconductors. (C) Thermistors. (D)Solders. Ans: Hall Effect is associated with semiconductors.

Demand meters, Demand Meters Demand meters measure volt-amperes (in kV...

Demand Meters Demand meters measure volt-amperes (in kVA), that merge both reactive (reflected) and actual (consumed) power. In its easiest form, a demand meter has a gauge wh

Linear time invariant, A LIT (linear time-invariant) system, impulse respon...

A LIT (linear time-invariant) system, impulse response h [ n ], is described by: (a) Show the block-diagram representation for this FIR filter (only use multiplier, adder

Superposition, what is the purpose of superposition theorem

what is the purpose of superposition theorem

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd