Explanation:
In a nuclear reactor, a large fissile atomic nucleus like uranium-235 absorbs a thermal neutron and undergoes a nuclear fission reaction. The heavy nucleus splits into two or more lighter nuclei releasing gamma radiation and free neutrons.
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In image formation from spherical mirrors, only paraxial rays are considered because they:
The half-life of radium is about 1600 years. Of 100 g of radium existing now, 25 g will remain unchanged after
|
(a) 2400 years |
(b) 3200 years |
(c) 4800 years |
(d) 6400 years |
Nuclear fusion is common to the pair
|
(a) Thermonuclear reactor, uranium based nuclear reactor |
|
(b) Energy production in sun, uranium based nuclear reactor |
|
(c) Energy production in sun, hydrogen bomb |
|
(d) Disintegration of heavy nuclei, hydrogen bomb |
The working of optical instruments like camera, microscope, telescope, etc. having glass lenses is based on a phenomenon of light. Identify the phenomenon.