If fa and ff represent the carrier wave frequencies for amplitude and frequency modulations respectively, then
|
(a) |
(b) |
(c) |
(d) |
If fa and ff represent the carrier wave frequencies for amplitude and frequency modulations respectively, then
|
(a) |
(b) |
(c) |
(d) |
(b)
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If a transparent medium of refractive index m = 1.5 and thickness t = 2.5 × 10–5 m is inserted in front of one of the slits of Young’s Double Slit experiment, how much will be the shift in the interference pattern? The distance between the slits is 0.5 mm and that between slits and screen is 100 cm
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(a) 5 cm |
(b) 2.5 cm |
(c) 0.25 cm |
(d) 0.1 cm |
The wavelength associated with an electron accelerated through a potential difference of 100 V is nearly
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(a) 100 Å |
(b) 123 Å |
(c) 1.23 Å |
(d) 0.123 Å |
Huygen’s principle of secondary wavelets may be used to
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(a) Find the velocity of light in vacuum |
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(b) Explain the particle behaviour of light |
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(c) Find the new position of the wavefront |
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(d) Explain photoelectric effect |
The idea of matter waves was given by
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(a) Davisson and Germer |
(b) de-Broglie |
(c) Einstein |
(d) Planck |
In a single slit diffraction of light of wavelength l by a slit of width e, the size of the central maximum on a screen at a distance b is
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(a) 2bλ + e |
(b) |
(c) |
(d) |