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!
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.
in which case there is change in acceleration in case of pulley?
Inertia with a spade Scoop up a spadeful of dry earth. Now pitch the earth away from you. View that when the spade stops the earth flies on due to inertia.
Illustrate what is a positron? Answer:- A positron is a positively charged electron and it's an anti-electron - antimatter! The positron has a charge of +1 just the opposi
Two point changes q1 and q2 are placed at a distance r from one another then electrostatic potential energy of two phase charge system will be kq 1 q 2 /r . We take P.E. of two ch
a) A charge Q is placed at the centre of a cube. determine the flux of the electric field through the six surfaces of the cube. b) Determine the magnitude of the electric field
The conductivity of an extrinsic semiconductor (A) Decreases with temperature. (B) Increases with temperature. (C) Remains constant with temperature. (D) Decrea
history
Write the expetiment of vernier caliper?
A Rayleigh interferometer (as shown in the figure below) can be used to measure the index of refraction of air. Two transparent tubes (T 1 and T 2 ) are placed behind two slits. O
In the device shown in Figure, when the current in the primary coil of 1000 turns increases linearly from 1A to 6A in 200ms, an e.m.f. of 15V is induced into the secondary coil of
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd