Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
COHERENCE :
1) Visible light energy is emitted when the excited electrons in atoms undergo transitions to the ground state.
2) In ordinary light sources, these transitions take place at random in time and the light waves received at a point on a screen bear no definite phase relation among them.
3) But, in a laser source, electronic transitions take place in an 'orderly way' and the light waves emitted have a consistent phase relation which does not change with time.
4) This is called 'temporal coherence' and is the most important characteristic of laser light.
Determine the Einstein relations by upward and downward transition. While the system is in equilibrium, the upward and downward transition rates should be equal. N 1 ρ(ν) B
Rayleigh criterion; resolving power: A criterion for finding out how finely a set of optics might be able to distinguish. It start with the supposition that central ring of on
State and illustrate Huygens' principle. Explain the consequences of total internal reflection.
A record player's needle is 6.5 cm from the center of a 45-rpm record. Calculate velocity of the needle?
Will light go any length along the fiber? Each conductor has losses, and in the case of fiber optics, all these are sizeable. Light losses into the industry average 2 to 5 perc
Explain Motion in 2 Dimensions When motion occurs in two dimensions, position, displacement and distance, speed, velocity and acceleration can be described using the x-y plane.
The energy needed to ionize an atom is known as ionization energy. It is the energy needed to make the electron jump from the present orbit to the infinite orbit.
DC high-current measurement: In common with many simple multimeters, both analogue and digital, the high current range (e.g. 10A) is not only selected using the range selector
Radial is exactly centripetal force?
The superposition theorem is a very useful network theorem. Write its statement
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd