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

Explain infrared waves, Infrared Waves: Infrared wave also known as hea...

Infrared Waves: Infrared wave also known as heat wave. These waves are radiation by hot body at dissimilar temperature.

What is conductors and insulators, What is Conductors and insulators Co...

What is Conductors and insulators Conductors - one or more electrons from each atom in solid can move freely by body conducting electric charge (metals) Insulators - electro

Explain general theory of gravitation, Explain General Theory of Gravitatio...

Explain General Theory of Gravitation The idea of a gravitational field takes all the gravitational effects of a given mass like Earth and expresses them mathematically as a grav

Electromagnetic induction, how to prepare a working model on electromagneti...

how to prepare a working model on electromagnetic induction?

Series combination of the three resistors, Regard as three resistors having...

Regard as three resistors having three unique values of resistance. Presume the resistors are connected in series with each other. Additional suppose that the series combination of

State ideal gas equation, All the given four Laws may be written in one rel...

All the given four Laws may be written in one relation,  PV  = nRT =m/n RT   This formula is known as deal gas equation. Where m = mass of the gas M = molecular mass of t

State any three properties of the nuclear forces, Q. State any three proper...

Q. State any three properties of the nuclear forces. (i) A Nuclear force is charge independent. (ii) A Nuclear force is the strongest recognized force in nature. (iii) Nucl

Bridgmann stock bargee technique, It is suitable for growing semi-conductiv...

It is suitable for growing semi-conductively alloys like gallium arsenide. A typical arrangement is furnished with an induction heater that provides a controllable temperature grad

Moment of inertia, moment of inertia theory and easy diagrams

moment of inertia theory and easy diagrams

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