NCERT Solutions Class 11 Physics - Solved Exercise Question 1.14



Question 1.14: 

“It is more important to have beauty in the equations of physics than to have them agree with experiments”. The great British physicist P. A. M. Dirac held this view. Criticize this statement. Look out for some equations and results in this book which strike you as beautiful.

Solution:

An equation which agrees with experiment must also be simple and hence beautiful. We have some simple and beautiful equations in Physics such as 
 E = mc2 (Energy of light)
E = hv (Energy of a photon)
KE = 1/2mv2(Kinetic energy of a moving particle) 
PE = mgh (Potential energy of a body at rest)
W = F.d (Work done)

All have the same dimensions. One experiment shows dependency  of energy on speed, the other shows dependency on frequency & displacement. 
That's the beauty of equations in Physics coming from different experiments. 

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