Visible light passing through a circular hole forms a diffraction disc of radius 0.1mm on a screen. If X-ray is passed through the same set-up, the radius of the diffraction disc will be
(a) zero
(b) <0.1mm
(c) 0.1mm
(d) >0.1mm.
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The visible universe is estimated to contain 1022 stars. How many moles of stars are present in the visible universe?
Number of moles of stars = 1022 / 6.023×1023 = 0.0166 mols
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A circular disc X of radius R is made from an iron plate of thickness t, and another disc Y of radius 4R is made from an iron plate of thickness t/4.
Aapne galat solve kiya hai
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A circular disc X of radius R is made from an iron plate of thickness t, and another disc Y of radius 4R is made from an iron plate of thickness t/4.
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A heavy ring of mass m is clamped on the periphery of a light circular disc.
(c) 2mv2/r must be acting on the system Explanation: Since the heavy ring and the small particle have equal masses, the center of mass of the system will be at r/2 from the...
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A circular disc A of radius r is made from an iron plate of thickness t and another circular disc B of radius 4r
(c) IA <IB Explanation: Let the density of iron plate be ρ. Mass of first disc m = πr²tρ M.I. = IA = ½mr² == ½πr²tρr² = ½πr4tρ Mass of second disc = M =...
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Two full turns of the circular scale of a screw gauge cover a distance of 1mm on its main scale.
(a) : Least count of the screw gauge = (0.5mm)/50 = 0.01mm Main scale reading = 3mm. Vernier scale reading = 35 Therefore, Observed reading = 3 + 0.35 = 3.35 zero error =...
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A thin horizontal circular disc is rotating about a vertical axis passing through its centre.
(d) continuously decreases.
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Light from a point source falls on a screen. If the separation between the source and the screen is increased by 1%,
The correct answer is (c) 2%
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A circular disc A of radius r is made from an iron plate of thickness t,
(c) IA <IB Explanation: Let the density of iron plate be ρ. Mass of first disc m = πr²tρ M.I. = IA = ½mr² == ½πr²tρr² = ½πr4tρ Mass of second disc = M = π(4r)²(t/4)ρ =...
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In a single slit diffraction experiment, when a tiny circular obstacle is placed in the path of light from a distant source,
The waves diffracted at the edge of circular obstacle produce constructive interference at the centre of the shadow; producing a bright spot. Difference between Interference and Diffraction Interference Diffraction 1. All bright fringes are of...
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