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Huygens' construction; Huygens' principle (C. Huygens):
The mechanical propagation of any wave (exclusively, of light) is equal to supposing that each point on the wavefront behaves as point source of wave emission.
Are fibers optics systems expensive? To find out whether a system is expensive one would have to establish a comparison with an option, which in most cases doesn't exist. To co
The following three impedances are connected in series across a 40V, 20kHz supply: (i) a resistance of 8, (ii) a coil of inductance 130µHand5 resistance, and (iii) a 10 r
Gold Leaf Electroscope: A gold leaf electroscope is a device that can be used for notice charge. By the use of this device we can also detect whether a body is positively or ne
What is quantisation of electric charge?
Capacity
Q. What is electrostatic shielding? i) It is the method of isolating a certain region of space from external field. ii) It is basis on the fact that electric field inside a
give a example
Q. How can we increase the current sensitivity of a galvanometer? The current sensitivity of a galvanometer is able to be increased by (i) Rising the number of turns (ii
What is the Interference ? A single frequency light passing through a pair of closely spaced slits will show a pattern of vertical bands, due to alternating constructive and des
what do you understand about phsics
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