Energy generation in stars is due to nuclear fusion.
a. How a nuclear fusion is occurred ?
b. The energy released in nuclear fission process with uranium is the order of
c. Three types of radio active decay occur in nature. Briefly decribe them.
d. State the law of radio active decay.

Discuss the process of nuclear fusion and how energy is generated in stars.

In a fusion reactor, the reaction occurs in two stages. (i) Two deuterium (""_(1)^(2)D) nuclei fuse to form a tritium (""_(1)^(3)T) nucleus with a proton as product. (ii) A tritium nucleus fuses with another deuterium nucleus to form a helium (""_(2)^(4)He) nucleus with neutron as another product. Find (a) the energy released in each stage. (b) the energy released in the combined reaction per deuterium and (c) what percentage of the mass energy of the initial deuterium is released? Given : ""_(1)^(2)D=2.014102u,""_(1)^(3)T=3.016049u,""_(2)^(4)He=4.002603u,""_(1)^(1)H=1.007825u,""_(0)^(1)n=1.008665u Take 1u = 931 MeV