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 current through the diode in the circuit, Q. A diode is connected ...

Q. A diode is connected in series with a voltage source of 5 V and a resistance of 1 k. The diode's saturation current is given to be 10 -12 A and the I-V curve is shown in Find

Security alarm system, In this Project you will simulate a Security Alarm s...

In this Project you will simulate a Security Alarm system using the Quick flash board. A switch is placed as shown in the figure below. The main goal of this project is: Task 1:

Calculation of receiving end voltage, Calculation of Receiving End Voltage ...

Calculation of Receiving End Voltage Consider the simple circuit shown in Figure. To find the voltage V 2 using analytical method:   P = I V 2 = 0.5      ..... (1)

Voice control mobile base, i need help for my final year project, and i wil...

i need help for my final year project, and i will really appreciate if you can assist me as soon as possible

Extended industry standard architecture, How is EISA bus different from ISA...

How is EISA bus different from ISA bus? The Extended Industry Standard Architecture (EISA): it is a 32 bit modification to the ISA bus. Since computers became larger and had wi

Analog-to-digital converters, Analog-to-Digital (A/D) Converters An A/D...

Analog-to-Digital (A/D) Converters An A/D converter converts analog input signals into digital output data in many areas such as process control, aircraft control, and telemetr

Evaluate the form factor, Evaluate the form factor: For the saw tooth ...

Evaluate the form factor: For the saw tooth wave illustrated in Figure, find out the form factor. Figure: Saw Tooth Wave Solution Time period of given wave i

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