In Fresnel’s biprism experiment, on increasing the prism angle, fringe width will
|
(a) Increase |
(b) Decrease |
|
(c) Remain unchanged |
(d) Depend on the position of object |
(b) Decrease
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A parallel plate capacitor is made by stacking n equally spaced plates connected alternately. If the capacitance between any two plates is C then the resultant capacitance is
|
(a) C |
(b) nC |
(c) (n – 1)C |
(d) (n + 1)C |
Quantam nature of light is explained by which of the following phenomenon
|
(a) Huygen wave theory |
(b) Photoelectric effect |
|
(c) Maxwell electromagnetic theory |
(d) de-Broglie theory |
Shift by which the object appears to be raised depends on:
An object is immersed in a fluid. In order that the object becomes invisible, it should
|
(a) Behave as a perfect reflector |
|
(b) Absorb all light falling on it |
|
(c) Have refractive index one |
|
(d) Have refractive index exactly matching with that of the surrounding fluid |