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!
What is spontaneous emission? Explain in brief.
Spontaneous emission:
a. This is the process by that a light source as like an atom, molecule, nano-crystal or nucleus into an excited state undergoes a transition to the ground state and then emits a photon.
b. The atoms into the excited state drop to the lower energy state after they have stayed within the excited state for a short duration of time known their life time.
c. Throughout this process photons of energy hν = E2 - E1, that is energy difference in between the two states of the atom, those are emitted.
d. Spontaneous emission of light or luminescence is a basic process which plays a necessary role in various phenomena into nature and forms the basis of several applications, as like fluorescent tubes, plasma display panels, television screens, lasers and light emitting diodes.
AVERAGE VELOCITY: The ratio of the total displacement to the total time taken by the body is known as average velocity and represented by V ?av.
It is the phenomenon of emission of electrons from the surface of metals, when light radiations (Electromagnetic radiations) of suitable frequency drop on them. The emitted electro
find acceleration of spacecraft will changed during journey and velocity and displacement if formula for displacement " s " and velocity V S=ut +1/2 at.... (t to power 2) V= u+at
what arethe concepts oflight
Q. On what factors does the amount of optical rotation depend? The amount of optical rotation relay on (a) Thickness of crystal (b) Density of the crystal or else concent
FULLERENE: The fullerene is a cage like hollow molecules composed of hexagonal and pentagonal groups of atoms, and especially those formed from carbon, that constitute the third
Q. Why X-rays are not used in microscopes? 1) The wavelength of X-rays is slighter than that of the visible light. 2) X-rays can't be focussed as visible radiations are foc
Measurement of length: If the Zeroth division of the head scale does not coincide with the index line the Screw gauge has Zero error. If the Zeroth division of the head Sca
State Gauss divergence theorem in vector calculus?
How many types of hologen and gas discharge are there? This will depend upon the use of the system. Gas discharge lamps, particularly those with a very small plasma area are pr
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