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CBSE Class 11-science Answered

I want detailed information about this equation... ∆m=(h÷c^2)×[{1÷T2}-{1÷T1}] Here ∆m =change in Mass.           c= speed of light.           h =planks constant.           T =time.
Asked by Sainishrichand | 16 Jan, 2020, 10:25: PM
answered-by-expert Expert Answer
Dimentionally this equation is correct. The give equation is rewritten as given below
 
Δm c2 = h [ (1/T1) - (1/T2)]
 
LHS represents energy converted from destruction of mass that happens only in nuclear reactions like fission and fusion.
 
In fission and fusion reactions, mass difference Δm between reactants and products appear in the form of energy
 
Mass is created from radiation in pair-production , i.e.high energy  γ-ray is converted to electron-positron pair.
 
In RHS , plancks constant appears that is related to photon radiations like light or in general electromagnetic radiation.
 
if time given in the equation represents period of vibratory or oscillatary motionm then reciprocal of time is frequency of vibrations.
 
Planck constant multiplied by frequency gives energy dimentionally
 
So the equation gives the impression, that energy difference between two modes of vibration is released in the form
of electromagnetic radiation and this radiation is converted to mass Δm
 
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