A) fusion of protons during synthesis of heavier elements
B) gravitational contraction
C) burning of hydrogen in the oxygen
D) fission of uranium present in the sun
Correct Answer: A
Solution :
In sun energy in huge amount is proposed due to fusion of 4 protons (hydrogen nucleus) into a helium nucleus according to the reaction \[_{1}{{H}^{1}}+{{\,}_{1}}{{H}^{1}}+{{\,}_{1}}{{H}^{1}}+{{\,}_{1}}{{H}^{1}}\,\to {{\,}_{2}}H{{e}^{4}}+2+{{\,}_{1}}{{\beta }^{0}}\] \[+\gamma \,(energy)\,+2v\] Note: It is estimated that sun will radiate energy at its present rate for next one thousand crore \[({{10}^{11}})\] years.
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