- AHuygen
- BNewton
- CMaxwell
- DHertz
Explanation:
The corpuscular theory was largely developed by Sir Isaac newton. Newton's theory remained in force for more than 100 years and took precedence over Huygen's wave front theory, partly because of Newton’s great prestige.
When the corpuscular theory failed to adequately explain the diffraction, interference and polarization of light it was abandoned in favour of Huygens' wave theory.
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Light of frequency 4n0 is incident on the metal of the threshold frequency n0. The maximum kinetic energy of the emitted photoelectrons is
|
(a) |
(b) |
(c) |
(d) |
A chain reaction is continuous due to
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(a) Large mass defect |
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(b) Large energy |
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(c) Production of more neutrons in fission |
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(d) None of these |
Assertion : The force of repulsion between atomic nucleus and a-particle varies with distance according to inverse square law.
Reason : Rutherford did a-particle scattering experiment.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
Equal charges are given to two spheres of different radii. The potential will
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(a) Be more on the smaller sphere |
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(b) Be more on the bigger sphere |
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(c) Be equal on both the spheres |
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(d) Depend on the nature of the materials of the spheres |
α - particles of energy 400 KeV are bombarded on nucleus of
. In scattering of α - particles, its minimum distance from nucleus will be
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(a) 0.59 nm |
(b) 0.59 Å |
(c) 5.9 pm |
(d) 0.59 pm |
A charge q coulomb moves in a circle at n revolutions per second and the radius of the circle is r metre. Then magnetic field at the centre of the circle is
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(a) |
(b) |
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(c) |
(d) |
An electromagnetic wave of frequency v = 3.0MHz passes from vacuum into a dielectric medium with permittivity ε = 4.0 . Then
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(a) Wavelength is doubled and the frequency remains unchanged |
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(b) Wavelength is doubled and frequency becomes half |
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(c) Wavelength is halved and frequency remains unchanged |
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(d) Wavelength and frequency both remain unchanged |