Purchase Solution

Optical fibre

Not what you're looking for?

Ask Custom Question

(a) Describe the terms of reflection, absorption, and transmission with suitable diagrams. Present and explain the relationship between reflection, absorption and transmission coefficients. Describe the differences between materials that are opaque translucent and transparents.
(b) An optical fibre consists of a core of refractive index 1.667 surrounded by a cladding of refractive index 1.523. The refractive index of air is 1.000. (See the question sin the attachment to see figures and questions to calculate).
(c) The visible electromagnetic spectrum is defined to range from blue light of wavelength 400nm through to red light of wavelength 700nm. A light-emitting dioxide display made using GeAs-GaP emits photons with the energy E=1.8eV. Find the wavelength of the light and answer whether it is closer to the blue light or red lights.
(d) A pulse of white light is sent straight down a fibre optic cable 1km long the refractive index to the blue light or red light. (see attachment for further calculations).

Purchase this Solution

Solution Summary

There are two parts: 1. understanding reflection, refraction and absorption, 2. A numerical problem related to transmission of light through fibre optics.

Solution Preview

4a. Incident radiation energy (Qi) on a surface of a body, partly gets absorbed (Qa) by the body, partly reflected (Qr) and partly transmitted (Qt) through the body (see attached Figure).

Qi = Qa + Qr + Qt

Divided by Qi both the sides,
1 = Qa/Qi + Qr/Qi + Qt/Qi
=> a + r + t =1
a = Qa/Qi == absorption coefficient: fraction of incident radiation energy which gets absorbed by the body.
r = Qr/Qi == reflection coefficient: fraction of incident radiation energy which gets reflected by the body.
t ...

Solution provided by:
  • BEng, Allahabad University, India
  • MSc , Pune University, India
  • PhD (IP), Pune University, India
Recent Feedback
  • " In question 2, you incorrectly add in the $3.00 dividend that was just paid to determine the value of the stock price using the dividend discount model. In question 4 response, it should have also been recognized that dividend discount models are not useful if any of the parameters used in the model are inaccurate. "
  • "feedback: fail to recognize the operating cash flow will not begin until the end of year 3."
  • "Answer was correct"
  • "Great thanks"
  • "Perfect solution..thank you"
Purchase this Solution

Free BrainMass Quizzes
Basic Physics

This quiz will test your knowledge about basic Physics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.