Photoelectric effect, Physics

Assignment Help:

Photoelectric effect

An effect described by A. Einstein that demonstrates that light appears to be built up of photons or particles. Light can do excite electrons (called photoelectrons in this context) to be ejected through a metal. Light along below frequency a sure threshold, at any particular intensity, will not cause any photoelectrons to be emitted from the metal. Above that particular frequency, photoelectrons are emitted in proportion to the intensity of incident light.

The cause is that a photon contains energy in proportion to its wavelength, & the constant of proportionality is the Planck constant. Below a firm frequency and therefore below a certain energy -- the incident photons do not have enough energy to knock the photoelectrons out of the metal. Above that threshold energy, called the work function, photons will knock on the photoelectrons out of the metal, in proportion to the number of photons (the intensity of the light). On to higher energies & frequencies, the photoelectrons ejected get a kinetic energy corresponding to the difference among the photon's energy and the workfunction.


Related Discussions:- Photoelectric effect

Show the amperes law, The integral in Ampere's Law is an integral. ...

The integral in Ampere's Law is an integral. Answer: The integral is an integral along (over) a closed path (curve).

Physics, What is quarter wave plate? Give its theory

What is quarter wave plate? Give its theory

Define kepler''s laws, Johannes Kepler revealed three empirical laws by usi...

Johannes Kepler revealed three empirical laws by using the data on planetary motion, pertaining to the orbit of planets. These laws are contained here because of the huge importanc

What is the symbol of the charge on the ball, Consider two identical plasti...

Consider two identical plastic foam balls each one having a thin sheath of aluminium foil. One of the balls has a few positive charges and the other has the same amount of negative

Work and energy, calculate the work required to be done to stop a car of 15...

calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?

Adiabatic reversible expansion of an ideal gas, Derive the mathematical exp...

Derive the mathematical expression PV r = constant for an ideal gas undergoing adiabatic reversible expansion.

Will we always see a difference in brightness along an optic, Will we alway...

Will we always see a difference in brightness along an optic? Not essentially so. The human imagine system appreciates illuminance grades into a logarithmic fashion and when th

Determine the maximum bending moment, The weightless simply supported beam ...

The weightless simply supported beam below has a VDL of P61kN/m, a point load of P62 kN and a UDL of P63 kN/m as shown.  Determine the vertical reaction force at A the maximum bend

Process to calculate teh number of atoms per unit cell, Process to calculat...

Process to calculate teh number of atoms per unit cell The number of atoms per unit cell is equal to the product of 'the number of atoms per basis' and 'the number of basis per

The algebra of dimensionality, Rule 1: In order to sum or subtract two phys...

Rule 1: In order to sum or subtract two physical quantities the quantities must have the similar dimension. The final physical quantity has the similar dimensions. Physical quantit

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