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I was asked this recently and wasn't sure. The power of the sun is much more powerful than that of a Nuclear explosion but the question was what is the worst that could happen, we are assuming a situation where the nuclear bomb wasn't itself immediately destroyed by proximity of the sun for whatever reason.

So, for example, if it was near the surface, could that cause a massive sun spot or similar which could disrupt electronics

b.t.w. my background isn't a physics one :-)

thanks

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The Tsar bomb released an energy of $240 \mathrm{PJ}$ .

The sun releases an energy of $10^{26} \mathrm{J}$ per second.

That means there is a difference of $9$ orders of magnitude (supposing that the bomb released all it energy in a second), so the effect is negigible.

It's like comparing the output of a coal power plant and a microwave oven.

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    $\begingroup$ Note: not "10⁹ orders of magnitude" — it is "9 orders of magnitude". $\endgroup$
    – Daniel Andersson
    Commented Jun 7, 2014 at 10:11
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    $\begingroup$ Could the neutrons released from the bomb, result in an unstable chain reaction? If no, then your answer is all that needs to be said. $\endgroup$
    – Rijul Gupta
    Commented Jun 7, 2014 at 11:09
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    $\begingroup$ @RijulGupta Such an explosion would release maybe a few kilograms of free neutrons, so no. And anyway, "chain reactions" are a feature of fission (where each fission releases more catalyzing neutrons); fusion reactions are essentially governed by temperature and pressure. $\endgroup$
    – rob ♦
    Commented Jun 7, 2014 at 12:21

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