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Wize University Physics Textbook (Master) > Heat and Temperature

Heat Transfer: Black Body Spectrum

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The power of radiation light bulb A is double the power of radiation of light bulb B. Both bulbs are in spherical shape but the radius of bulb B is double the radius of bulb A. If they have the same emissivity factor, find a relationship between the wavelength at which these bulbs have their max power radiated.
More Heat Transfer: Black Body Spectrum Questions:
New Practice Question
A solar panel is made of 6 rectangular sections each with dimensions of 1.8m by 2m. The albedo factor of this panel is calculated to be 0.4 and it has the emissivity factor of 0.8. This panel is 24% efficient in converting light to electrical power. If the solar constant on earth is 1360 W/m2:
a) Find the power produced by this panel when it is exposed to the Sun.
b) Find the temperature of the panel when it is exposed to the Sun.
Electromagnetic radiation: Wave energy
Given a hot stone (T=1400°CT=1400\degree C), what is the peak wavelength of radiation? Where is this compared to the visible spectrum? Can you use this principle to describe why an object may not look hot, but actually be emitting large amounts of energy?