- AAlpha particles can be scattered by Gold nucleus
- BX-ray can be diffracted by crystals
- CUV radiation can cause Photoelectric effect
- DElectrons cannot be diffracted by crystals
Explanation:
Fast moving electrons are associated with wave and hence they show diffraction.
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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 oscillating electric and magnetic vectors of an electromagnetic wave are oriented along
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(a) The same direction but differ in phase by 90° |
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(b) The same direction and are in phase |
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(c) Mutually perpendicular directions and are in phase |
|
(d) Mutually perpendicular directions and differ in phase by 90° |
Fermi level of energy of an intrinsic semiconductor lies
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(a) In the middle of forbidden gap |
(b) Below the middle of forbidden gap |
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(c) Above the middle of forbidden gap |
(d) Outside the forbidden gap |