In Young's double slit experiment, a glass plate is placed before a slit which absorbs half the intensity of light. Under this case
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(a) The brightness of fringes decreases |
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(b) The fringe width decreases |
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(c) No fringes will be observed |
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(d) The bright fringes become fainter and the dark fringes have finite light intensity |
(d) The bright fringes become fainter and the dark fringes have finite light intensity
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Assertion : In photoelectric effect, on increasing the intensity of light, both the number of electrons emitted and kinetic energy of each of them get increased but photoelectric current remains unchanged.
Reason : The photoelectric current depends only on wavelength of light.
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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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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(d) If the assertion and reason both are false. |
The reason of seeing the Sun a little before the sunrise is
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(a) Reflection of the light |
(b) Refraction of the light |
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(c) Scattering of the light |
(d) Dispersion of the light |
The average binding energy per nucleon in the nucleus of an atom is approximately
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(a) 8 eV |
(b) 8 KeV |
(c) 8 MeV |
(d) 8 J |