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

Machines, what is power factor of generator at overexcitation

what is power factor of generator at overexcitation

Obtain the expression for the steady-state coil current, Q. Let the coil of...

Q. Let the coil of the solenoid of have a resistance R and be excited by a voltage v = Vm sin ωt. Consider a plunger displacement of g = g 0 . (a) Obtain the expression for the

What do you mean by direct coupling, Q What do you mean by Direct coupling?...

Q What do you mean by Direct coupling? In this method the a.c. output signal is fed directly to the next stage. No reactance is included in this coupling network. Special d.c.

Calculate the fraction of particles - top plate, Consider a colloidal suspe...

Consider a colloidal suspension of latex particles confined between two plates. The plates are charged, so there is an electric potential difference V between them (as shown). The

What is the probability that a call will be blocked, A three stage switchin...

A three stage switching structure is to accommodate N = 128 input and 128 output terminals. For 16 first stage and 16 last stage, verify the number of cross points for nonblocking.

Resistance temperature sensor, A Platinum resistance temperature sensor has...

A Platinum resistance temperature sensor has a resistance of 120 ohm at 0°C and forms one arm of a Wheatstone bridge. At this temperature the bridge is balanced with each of the ot

Define gray code - bcd to decimal conversion, Define Gray Code - bcd to dec...

Define Gray Code - bcd to decimal conversion? The Gray Code is a variation on binary code in which only 1 bit is changed from the preceding number. The bit so as to changes is

Compute the signal-to-noise ratio, Q. (a) An ampli?er with F 0 = 3 or 4.77...

Q. (a) An ampli?er with F 0 = 3 or 4.77 dB, f 0 = 4 GHz, and BN = 14 MHz is used with an antenna forwhich T a =200K. The connecting path loss is 1.45, or 1.61 dB at a physical t

Rrc rotate accumulator right instruction , RRC Rotate  Accumulator  Right...

RRC Rotate  Accumulator  Right Instruction This instruction also  rotates the contents of the  accumulator  toward right  by one bit. The  D 7   bit moves  to D 5   position a

Human resources - kpi, Human Resources - KPI It is the responsibility ...

Human Resources - KPI It is the responsibility of management to have the lean, capable, customer friendly organization that strives for catering to diversified need of all the

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