2009-06-01, 04:21 AM
Hazzy Wrote:If I shine 10 units of sunlight through a Magnifying Glass, I get some amount of heat on my target.
How does that heat change if I double the units of sunlight to 20?
If you shine x Candela through a Magnifying Glass and get y amount of heat transfer, and you repeat with 2x Candela, I believe you get around 2y amount of heat transfer, though it will vary depending on the surface, as well as the initial temperature, and intensity.
For the record, the brightness of light is measured by Intensity, with Candela. 10 units of sunlight has no real meaning. Also, heat is the transfer of energy from one body to another due to a difference of temperature.