Question

At what wavelength does the sun's blackbody radiation reach its peak? Express your answer in nanometers. (Although this peak wavelength is green, the sun emits light over the entire range of visible wavelengths, and appears yellow to the human eye.)

Use the following information for this question: The sun has a radius of 695,700 km and emits blackbody radiation at a temperature of 5778 K.  

Answer 1

wavelength at peak energy emission (for blackbody radiation) is

= 2898*10^-6/T

T = temperature on surface of earth = 5778 K

So,

= 2898*10^-6/5778

= 5.016*10^-7 m

= 501.6*10^-9 m

= 501.6 nm

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