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 fusion reaction, Fusion Reaction: In nuclear fusion light nucle...

Fusion Reaction: In nuclear fusion light nuclei are brought together to form a relation heavier nucleus. They energy free in nuclear fusion is larger than that free in fission.

Telescope, Working of terrestrial telescope

Working of terrestrial telescope

Evaluate kinetic energy and momentum, If a proton and an electron have same...

If a proton and an electron have same de Broglie wavelength, which has more kinetic energy and momentum?

Heat and work, Heat is the energy that is operated because of differences i...

Heat is the energy that is operated because of differences in temperature among the body and the surrounding. The unit of heat energy is Joule. The basic difference among study

The area of a plate assuming a two-plate construction, A capacitor is to be...

A capacitor is to be constructed so that its capacitance is 0.2µF and to take a p.d. of 1.25kV across its terminals. The dielectric is to be mica which, after allowing a safet

Identify the key terms in wave function, Identify the key terms in the wave...

Identify the key terms in the wave function provided by

Direct and indirect recombination, The recombination procedure is represe...

The recombination procedure is represented with returning the electron from the CB where it is free into a hole in the VB where it is in a bond. The excess energy of the electron

Simple harmonic motion i, Simple Harmonic Motion I Demonstrating in whi...

Simple Harmonic Motion I Demonstrating in which one component of uniform circular motion is simple harmonic motion.

What is the ratio of potential difference, Three capacitors of capacitance ...

Three capacitors of capacitance , and are connected in parallel 1) What is the ratio of potential difference? 2) What is the ratio of charges?  Will there be electric

Electric and magnetic phenomena, The line density of charge in a wire is 0....

The line density of charge in a wire is 0.20 Cm-1. If this wire is symmetrically enclosed along its length by a cylindrical surface of radius 1.0 m and length 1.5 m, calculate

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