An electron is moving in the north direction. It experiences a force in vertically upward direction. The magnetic field at the position of the electron is in the direction of
|
(a) East |
(b) West |
(c) North |
(d) South |
(a) East
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The maximum intensity in Young's double slit experiment is I0. Distance between the slits is d = 5 l, where l is the wavelength of monochromatic light used in the experiment. What will be the intensity of light in front of one of the slits on a screen at a distance D = 10d
|
(a) |
(b) |
(c) |
(d) |
Lens used to remove long sightedness (hypermetropia) is
|
(a) Concave lens |
(b) Plano-concave lens |
|
(c) Convexo-concave lens |
(d) Convex lens |
