Say a curved 2m Square mirror board is reflected and focused to a 0.01 Square meter area, does the temperature (t) = 200t?
The energy density of the sunlight hitting is 200X higher but that does NOT mean the temperature is 200X higher. There is a solar power electrical generator that uses a lot of mirrors to focus sunlight on a heat exchanger that is cooled with water (a solar powered water heater), the water heats up, boils, and the steam turns a turbine.
