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Darken the sky by using magic

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So in my world, there is something called magic energy: a form of energy that can be control and, you know, do magic stuff. Like normal energy, they can not be created or destroyed, but only change form. At somepoint in history, my human learned how to "harvest" energy in the surrounding and transform them into magic. These energy input can be heat, wind, sound, light or biological etc.

And here the question. (Disclaimer: it may sound basic or even stupid, but i just can't wrap my head around) "Can you darken the sky by (purely) harvesting too much light energy?"

This mage harvest energy in a 30-meter radius, and light energy will immediately transform when they enter the zone. Would it result in a 30-meter dome of shade in the midnoon?

I understand that it would mean a tremendous amount of energy, but this mage can do that. it could be equal to hundreds of the Hiroshima bomb and still be okay: the scale is not a problem.

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This post was sourced from https://worldbuilding.stackexchange.com/q/53299. It is licensed under CC BY-SA 3.0.

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