The half-lives of radioactive sample are 30 years and 60 years for two decay processes. If the sample decays by both the processes simultaneously. The time after which, only one-fourth of the sample will remain is
Which one of the following atatement i9s WRONG in the context of X- rays generated from X- rays tube ?
Binding energy per vs mass curve for nucleus is shown in the figure W,X,Yand Z are four nuclei indicated on the curve . The process that would rease energy is
Fill in the blanks with appropriate items :
Consider the following reaction, .2H1+.2H1=.4He2+Q.
Mass of the deuterium atom= 2.0141u , Mass of the helium atom = 4.0024u
This is a nuclear ________ reaction in which the energy Q is released is ______ MeV.
The β−decay process , discoverwd around 1900 , is basically the decay of a neutron (n) in the laboratory , a proton (p) and an electron
If the - neutrono had a mass of 3eV/c2 (where c is the speed of light ) insend of zero mass , what should be the range of the kinectic energy K. of the electron ?
An alpha particle of energy 5MeV is scattered through 180∘ by a found uramiam nucleus . The distance of appreach is of the order of
The wavelength of the characteristic X - ray kα line emited by a bydroges like element is 0.32λ . The wavelength of the Kβ line emited by the same element will be …..
Consider a hydrogen atom with its electron in the nth orbital An electomagnetic radiation of wavelength 90nm is used to ionize the atom . If the kinetic energy of the ejected electron is 10.4eV , then the value of nis(hc=1242eVmn)
When a particle is restricted to move along x- axis between x=0andx=4 whwre a is opf nanometer demension , its energy can take only certain spscfic values . The allowed energies of the particles only in such a restiricted regain , correspond to the formation of standing wave with nodes at its end x=0andx=a.The wavelength of this standing wave is related to the linear momentum p of the paarticle according to the de Broglie relation .The energy of the particle of mass m is reated to its linear momentum as
E=2mp2 . thus , the energy of the particle can be denoted by a quantum number n taking value 1,2,3,….(n=1,cal≤dthegroundstate) corresponding to the number of loops in the standing wave use the model described above to answer the following there question for a particle moving in the line x=0→x=aTakeh=6.6×10−34Jsande=1.6×10−19C
The alloewd energy for the particle for a particular value of n is proportional to