सौर ऊर्जा का स्रोत क्या है?

Question

सौर ऊर्जा का स्रोत क्या है?

1. A. नाभिकीय संलयन (Correct answer)
2. B. नाभिकीय विखंडन
3. C. रासायनिक क्रिया
4. D. उपरोक्त सभी

Correct Answer

Option A — नाभिकीय संलयन

Detailed Solution & Explanation

The correct answer is नाभिकीय संलयन (nuclear fusion).

Key Points

• The Sun's energy comes from nuclear fusion, in which hydrogen nuclei fuse into helium at temperatures of about 15 million °C in the core.
• The lost mass converts to energy according to E = mc².

Additional Information

• The dominant process is the proton-proton (p-p) chain.
• Nuclear fission — splitting heavy nuclei such as uranium — is what powers nuclear reactors and atomic bombs, not stars.
• The Sun is roughly 74% hydrogen and 24% helium.