In Young's double slit experiment, the phase difference between the light waves reaching third bright fringe from the central fringe will be (λ =6000 Å )
|
(a) Zero |
(b) 2π |
(c) 4 π |
(d) 6 π |
(d) 6 π
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When a lamp is connected in series with capacitor, then
|
(a) Lamp will not glow |
(b) Lamp will burst out |
|
(c) Lamp will glow normally |
(d) None of these |
Two particles A and B of masses 
and 
respectively and having the same charge are moving in a plane. A uniform magnetic field exists perpendicular to this plane. The speeds of the particles are 
and 
respectively, and the trajectories are as shown in the figure. Then
|
(a) |
(b) |
|
(c) |
(d) |
The wavelength of sodium light in air is 5890 Å. The velocity of light in air is 3 
The wavelength of light in a glass of refractive index 1.6 would be close to
|
(a) 5890 Å |
(b) 3681 Å |
(c) 9424 Å |
(d) 15078 Å |
A 60 watt bulb is hung over the center of a table 4 m × 4 m at a height of 3 m. The ratio of the intensities of illumination at a point on the centre of the edge and on the corner of the table is
|
(a) |
(b) 2 / 1 |
(c) 17 / 13 |
(d) 5 / 4 |
