Unanswered Modern Physics Questions

WARNING : NOT FOR JEE ASPIRANTS as of now I was reading about special relativity and got some doubts I wud be glad for someone to clear these DOUBT 1 : TIME DILATION it is derived t = t' / 1 - (v/c)2 taking a ray of light mov ...

A spectroscopic instrument can resolve 2 nearly wavelengths λ & λ+δλ if λ/δλ < 8000. how many lines will be resolved by the instrument? ...

can ne1 plz tell me wazz relativistic momentum n wazz relativistic relason bet kinetic energy and linear momentum ...

there are 2radioactive substances who emit 2 and beta emissions there disintegration constant are in the ration 2 is to 3 fto hv equal probabilities of getting 2 and b particles the ration of the number of nuclei f a to the n ...

a point source of constant power is brought from infinity 2wards adisc along its axis.P is apoint on the axis.Radiation pressure at P 1st increases den decreases.Why? ...

Just like mass and charge, each particle has a quantity called “Lepton Number”. The table below gives charge and Lepton number of some particles. Like charge, lepton number should be conserved in any physical process. ((p ...

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Name two factors which determine the choice of a communication channel. Explain the use ofcoaxial cables as a communication channel with the help of its simple diagram. What are the advantages of coaxial cable? ...

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Hydrogen atom HA-1 and Hydrogen atom HA-2 are in ground state and in first excited state. A metal plate accepts energies 12.1 eV and 1.9 eV respectively from an Emission spectra.(Work fn=2eV) Find the number of possible lines ...

Consider a point source emitting a-particles and receptor of area 1 cm2 placed 1 m away from source. Receptor records any α-particle falling on it. If the source contains N0 = 3.0 × 1016 active nuclei and the receptor recor ...

In an experiment on photoelectric effect, light of wavelength 800 nm (less than threshold wavelength) is incident on a cesium plate at the rate of 5.0 W .The potential of the collector plate is made sufficiently positive with ...

the photoelectrons ejected from the photocathode of a PMT, are said to be of a random count. i.e. for a single given photon hitting the photocathode, the ejection of photoelectrons are sometimes 10 photoelectrons, sometimes 7 ...

Hi all, get relevant and useful flash animations in physics at http://www.mksfoundation.com/flashlets.aspx and lot of other free stuff for JEE preparation at this site. ...

can any one explain me the quantum confinement effect ? ...

Please explain young's double slit experiment in details. ...