You cannot use a magnifying glass to make something hotter than the source of the light. The thermodynamics principle is unyielding. This is a tough tricky th

You cannot use a magnifying glass to make something hotter than the source of the light. The thermodynamics principle is unyielding. This is a tough tricky thermodynamics question because it really seems like you can use a really big magnifying glass to make say an object that is hotter than the sun. I remember working through it in a physics class.