What are Telephone Links?
admin In today’s fast world, telephone is a necessity. Telephony is not limited to earth. We can also converse from earth to any other planet e.g. moon, mars etc. It depends…
What is Optical Communication?
It is a system in which we use the optical range of frequencies to send or receive the information to distant place from one point to another. During the last…
Explain the different types of LASERS?
There are basically four types of lasers 1. Gas lasers 2. Solid lasers 3. Liquid lasers 4. Semi Conductor lasers Gas lasers:- These lasers contain a mixture of helium and…
What are the main components of LASERS?
The lasers mainly consist of three major components. These are Active medium, Pump, and resonator guide. First we will discuss active medium. It can be in molecular or in atomic…
Explain the various characteristics of LASER?
Various characteristics of LASER are: 1. Pumping source is present in all lasers which provide energy. 2. Active material is also used in all lasers. Its main purpose is to…
Explain various applications of LASER?
Various applications of LASERS are :- 1. Communication: – long distance telephone calls can be made using laser beams. 2. Surgery: – Retinal operations are carried out with the help…
What is Modulation of Light?
If we want to send or receive information through optical fiber cables then we have to attach some light signals with the information. This can be achieved either by digital…
What is Electrostatics?
The study of electric charges at rest is called electrostatics. Its other name is ‘static electricity’. A Greek philosopher ‘Thales’ in 600 BC conducted an experiment. He observed that when…
What is electric charge?
Electric charge is the feature of the sub atomic particles which determines the electromagnetic interaction between them. As we all know the positive and negative charges on an object are…
What is the origin of Electric charge?
Nucleus is present in the center of Atom. It contains protons and neutrons. Protons carry positive charge and neutrons carry negative charge. The protons and neutrons in an atom are…