by admin | Jun 3, 2015 | sem1
Absorption Coefficient Definition and Formula The absorption coefficient determination how far into a material light of a particular wavelength can penetrate before it is absorbed. In a material with a low absorption coefficient, light is only poorly absorbed, and if...
by admin | Jun 3, 2015 | sem1
Non Destructive Testing Nondestructive testing or Non-destructive testing (NDT) is a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component or system without causing damage.The terms Nondestructive...
by admin | Jun 3, 2015 | sem1
Acoustic Grating Principle: When ultrasonic waves are passed through a liquid, the density of the liquid varies layer by layer due to the variation in pressure and hence the liquid will act as a diffraction grating, so called acoustic grating. Under this condition,...
by admin | Jun 3, 2015 | sem1
Growth and Decay method (A) Growth of current Suppose in the beginning we close the switch in the up position as shown in below in the figure Switch is now closed and battery E,inductance L and resistance R are now connected in series Because of self induced emf...
by admin | Jun 3, 2015 | sem1
Production of Ultrasonics by Magnetostriction method When magnetic field is applied across the length of a ferromagnetic rod such as Nickel, then change in the length of rod is observed. This is called Magnetostriction. The charge in length is propotional to the...
by admin | Jun 3, 2015 | sem1
Production of Ultrasonics by Piezoelectric method For generating ultrasonic waves of high frequency (about 50 MHz) a generator using the piezoelectric effect is employed. It is found that when crystals of some materials such as quartz, tourmaline, rocksalt etc. are...
