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Two light rays will interfere constructively with maximum amplitude if the path difference between them is: a) one wavelength b) one-half wavelength c) one-qua
What is the wavelength of electromagnetic waves of frequency 5 x 1019Hz in free space? Give its two applications.
What is hologram? Holography When an entity is photographed by a camera a two dimensional image of three dimensional objects is obtained. A three dimensional image of
Define about the Bell Jar? A vessel with a small hole of diameter d in it is delegate inside a high-vacuum chamber. The pressure is so low that the signify free path λ>> d.
What is a digital signal? Describe the function of modem in data communication. Write two benefits of digital communication
For this circuit which of the subsequent shows a correct way to connect a voltmeter to measure the voltage across R2? Answer: An perfect voltmeter has infinite resis
What do you mean by normal adjustment of a telescope? In What way it is better? What is the need of erecting lens in a terrestrial telescope? What do you mean by its magnific
Tell some examples of Like and Unlike Parallel Forces.
A proton (mass = 1.67 x 10 -26 kg charge = 1.60 x 10 -19 C) is running at a speed of 8.50 x 10 4 m/s at a point in an evacuated region of space where the electric potential is 3
Which of the following particles has more electrons than neutrons: (1) C (2) F- (3)O -2 (4)Al +3 Ans: O -2
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