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I know there is a physics law that says a light magnification can't be more hot than the light source itself, but can it be brighter at the least?

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marked as duplicate by John Rennie thermodynamics Mar 22 at 5:57

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  • $\begingroup$ See this XKCD on Fire from Moonlight. what-if.xkcd.com/145 $\endgroup$ – mmesser314 Mar 22 at 4:52
  • $\begingroup$ Thank you for the explanation@mmesser314 so basically you can't do what I am trying?? $\endgroup$ – Programmer Mar 22 at 4:54
  • $\begingroup$ Also just put this as an answer $\endgroup$ – Programmer Mar 22 at 4:54
  • $\begingroup$ I'm afraid not. I can't put this as an answer. It is just a reference. I didn't add to it. $\endgroup$ – mmesser314 Mar 22 at 5:02
  • $\begingroup$ Magnifying glasses only focuses the light into a smaller area. The light appears brighter because the intensity has increased, since you now have the same power (energy per unit of time) over a smaller area: 𝐼=𝑃/𝐴 $\endgroup$ – Nixnyete Mar 22 at 7:59

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