Define Fermats principle
Fermat's principle: principle of least time (P. de Fermat): The principle, put onward by P. de Fermat that explains the path taken by a ray of light among any two points in a system is for all time the path which takes the least time.
Briefly define or explain the cause of Brownian motion?
Explain in short why electron and proton encompass similar charge while the proton is 1836 times heavier?
Coanda effect: The effect which points out that a fluid tends to flow all along a surface, instead of flowing via free space.
Magnus effect: The rotating cylinder in a moving fluid drags a few of the fluid about with it, in its direction of rotation. This raises the speed in that area, and therefore the pressure is lower. Therefore, there is a total force on the cylinder in
Write down the vital difference between the electron and a beta ray?
Briefly explain the procedure to compute the tensile strength?
what should be the choice of standard unit.
Hubble constant: H0 (E.P. Hubble; 1925): The constant that determines the relationship among the distance to a galaxy and its velocity of recession due to the growth of the Universe. As the Universe is self-gravitating, it is not trut
What do you understand by term ray casting? Explain briefly?
Mach number (E. Mach): It is the ratio of the speed of an object in a specified medium to the speed of sound in that medium.
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