Population inversion and luminous flux, Physics

Assignment Help:

POPULATION INVERSION and LUMINOUS FLUX:

POPULATION INVERSION: The process in which number of electrons (N ) in a higher2 energy state called metastable state of an active medium is increased to a value greater than the number (N ) in the ground state (i.e. N  > N ) is called population inversion.

LUMINOUS FLUX : The amount of radiant (light) energy following from a source of light per unit time is called luminous flux or light flux (Φ) . It is measured in lumens.

LUMINOUS INTENSITY : Luminous intensity of a point source of light is defined as the luminous flux emitted from it per unit solid angle.

It is otherwise called Illuminating power (I). It is measured in candela (cd).

 

 


Related Discussions:- Population inversion and luminous flux

SOUND, WHEN SAME MUSIC IS PLAYED IN VIOLIN AND VEENA WE SHALL HEAR SOUND OF...

WHEN SAME MUSIC IS PLAYED IN VIOLIN AND VEENA WE SHALL HEAR SOUND OF?

Electrostatics, Can the whole charge of a body is transfer to another body

Can the whole charge of a body is transfer to another body

Ballistic missile, why ballistic missile is unpowered and unguided

why ballistic missile is unpowered and unguided

Little fish in motion is caught by big fish, Little Fish in Motion is Caugh...

Little Fish in Motion is Caught by Big Fish The animation below portrays the inelastic collision among a extremely massive fish and a less massive fish. Before the collision, t

Wave optics, can I get ready made project for wave optic?

can I get ready made project for wave optic?

Properties of semi-conductors, Their conductivity lies between conductor an...

Their conductivity lies between conductor and insulator. Their resistivity is usually high and temperature coefficient of resistance is always negative. These are materials which a

Dynamics, Piles of snow on slippery roofs can become dangerous projectiles ...

Piles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a pitch of 27. As the snow begins to melt, the c

Fluid Mechanics, True or False. The specific gravity of a fluid that sinks ...

True or False. The specific gravity of a fluid that sinks in water is greater than 1.00.

Spectrum, calour formed in pure and impure spectrum

calour formed in pure and impure spectrum

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