- ARed Shift
- BGreen Shift
- CYellow Shift
- DBlue Shift
Explanation:
When the wavelength of the light gets lengthened by the Doppler shift, we refer to the change as red shift.
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Two coherent sources have intensity in the ratio of . Ratio of (intensity) max/(intensity) min is
|
(a) |
(b) |
(c) |
(d) |
The force acting between proton and proton inside the nucleus is
|
(a) Coulombic |
(b) Nuclear |
(c) Both |
(d) None of these |
Light wave enters from medium 1 to medium 2. Its velocity in 2nd medium is double from 1st. For total internal reflection the angle of incidence must be greater than
|
(a) 30o |
(b) 60 o |
(c) 45 o |
(d) 90 o |
A pure semiconductor behaves slightly as a conductor at
|
(a) Room temperature |
(b) Low temperature |
|
(c) High temperature |
(d) Both (b) and (c) |
Value of potential at a point due to a point charge is
|
(a) Inversely proportional to square of the distance |
|
(b) Directly proportional to square of the distance |
|
(c) Inversely proportional to the distance |
|
(d) Directly proportional to the distance |