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Q. Why the centre of Newton's rings pattern appears dark?
The thickness of the air film becomes zero at the point of contact of lens L with glass plate P. Therefore there is no path difference between the interfering waves. So it must appear bright. However the wave reflected from the denser glass plate has suffered a phase change of π while the wave reflected at the spherical surface of the lens has not suffered any phase change. Therefore the point O appears dark.
Step to improve Power Factor By using static capacitor: Static capacitor is usually used to better the power factor of the power system. As the capacitor draws leading curre
Fast neutrons can be changed into slow neutrons by certain materials known as moderator's when last moving neutrons pass by a moderator, they combine with the molecules of the mod
Determine the highest order spectrum which can be seen with monochromatic light of 589.3 nm wavelength by means of a diffraction grating having 15000 lines/inch.
Centrifugal force with a ring Secure an iron ring about 6 cm in diameter and Join it to the cord on the drill. Observe the effects.
Q. Why nichrome is used as heating element in electric heating devices? Nichrome, an alloy of nickel as well as chromium is used as the heating element for the following reaso
A step-down transformer has 9000 turns on the primary coil and 150 turns on the secondary coil. The EMF in the primary coil is 16 V. What is the voltage being applied to th
The nuclei have been separated on the basis of the number of protons (atomic number) or the total number of nucleons (mass number) as given below: (i) Isotopes: The atoms of ele
Briefly explain the conditions for clear vision of interference fringes.
What is an illuminator? An illuminator, light generator or source is a box along with a lamp inside, pointing in the direction of an opening where fiber optics is secured. Obvi
Obtain expression for an optical path difference for formation of circular fringe in Michelson''s interferometer
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