.......... happens when a wave passes from one medium to another at an angle.
- ARefraction
- BReflection
- CDispersion
- DScattering
.......... happens when a wave passes from one medium to another at an angle.
Explanation:
Refraction is a phenomenon in which when a ray passes from one medium to another it bends away from its straight-line path due to the difference in optical densities or refractive indices of the two mediums.
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In the nuclear reaction
, the values of A and Z are
|
(a) A = 234, Z = 94 |
(b) A = 234, Z = 90 |
(c) A = 238, Z = 94 |
(d) A = 238, Z = 90 |
In an atomic bomb, the energy is released due to
|
(a) Chain reaction of neutrons and |
|
(b) Chain reaction of neutrons and |
|
(c) Chain reaction of neutrons and |
|
(d) Chain reaction of neutrons and |
The variation of potential with distance R from a fixed point is as shown below. The electric field at R = 5 m is
|
(a) 2.5 volt/m |
(b) -2.5 volt/m |
(c) 2/5 volt/m |
(d) -2/5 volt/m |