Determine the power intensity of radiation per unit wavelength emitted at a wavelength of 500.0 nm by a blackbody at a temperature of K.
A 200-W heater emits a 1.50- radiation. Radiation from the heater warms a 4.00-kg body by 2.00 K.
What value of the energy quantum does it emit?
Assuming that the specific heat capacity of the body is 0.83 kcal/kg⋅K, how many photons must be absorbed to warm the body?
Assuming that all the radiation that the heater emits is absorbed by the body, how much time is required for the body’s temperature to increase?
Lasers can be used as surgical instruments to vaporize flesh by heating it. A carbon dioxide laser used in surgery emits infrared radiation with a wavelength of 10.6 μm. In 1.00 ms, this laser raised the temperature of 1.00 cm3 of flesh to and evaporated it. Flesh has a latent heat of vaporization of kJ/kg.
How many photons were required to vaporize the flesh?
What was the minimum power output during the flash?