- AExplaining polarisation
- BDetermining focal length of lenses
- CDetermining chromatic aberration
- DGeometrical reconstruction of a wavefront
Explanation:
Huygens considered that light was propagated in longitudinal waves.
Huygen's concept explained the direction of propagation of light waves by geometrical reconstruction of wavefront.
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Energy released in fusion of 1 kg of deuterium nuclei
|
(a) 8 |
(b) 6 |
(c) 2 |
(d) 8 |
The capacitance of a parallel plate condenser does not depend on
|
(a) Area of the plates |
(b) Medium between the plates |
|
(c) Distance between the plates |
(d) Metal of the plates |
In a Ag voltameter 2.68 gm of silver is deposited in 10 min. The heat developed in 20Ω resistor during the same period will be

|
(a) 192 kJ |
(b) 192 J |
(c) 200 J |
(d) 132 kJ |

A conducting rod of length l is falling with a velocity v perpendicular to a uniform horizontal magnetic field B. The potential difference between its two ends will be
|
(a) 2Blv |
(b) Blv |
(c) |
(d) |
In the adjoining circuit diagram each resistance is of 10 W. The current in the arm AD will be
|
(a) |
(b) |
(c) |
(d) |
