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

Compute the flux through the coil, Q. A coil of area of cross section 0.5 m...

Q. A coil of area of cross section 0.5 m 2 among 10 turns is in a plane perpendicular to a magnetic field of 0.2 wb / m 2 . Compute the flux through the coil.

What is the wavelength of that sound wave, When an orchestra is tuning up, ...

When an orchestra is tuning up, the first violinist plays a note at 256 Hz. a. What is the wavelength of that sound wave if the speed of sound in the concert hall is 340 m/s?

What is magnetic field?, It is the area or region around the material where...

It is the area or region around the material where magnetic properties can be found is called as “magnetic field”.

Why, why sky is blue

why sky is blue

What is the electron''s speed?, An electron follows a helical path in a uni...

An electron follows a helical path in a uniform mag-netic field of magnitude 0.300 T. The pitch of the path is 6.00 um, and the magnitude of the magnetic force on the elec-tron is

Explain electrostatic induction, Electrostatic Induction: Electrostatic...

Electrostatic Induction: Electrostatic Induction is the process in which a charged object charges another neutral object without touching it.

Explain primary winding and a secondary winding- transformer, The current t...

The current transformer has a single turn on the primary winding and a secondary winding of 60 turns. The secondary winding is connected to an ammeter with a resistance of 0.15

Evaluate the total bound charge on the surface, A point charge q is imbedde...

A point charge q is imbedded at the center of a sphere of linear dielectric material (with susceptibility and radiusR). Find the electric field, the polarization, and the bound cha

Explain snells law, Q. Explain Snells Law? It is believed that Snell de...

Q. Explain Snells Law? It is believed that Snell developed his well-known equation by purely empirical means. He made various measurements of the refracting properties of vario

Filtering and image masking, Regarding filtering, image masking & convoluti...

Regarding filtering, image masking & convolution. Assume we have the following Infra-Red image:   What filter would you use to remove the impulsive noise in the first row o

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