Wien’s radiation law says that the wavelength of most intense radiation (λmax) emitted by a blackbody is inversely proportional to the absolute temperature (T) of the object. The surface of the Sun radiates as a blackbodyat a temperature ofT=6000 kelvins so that the Sun’sλmaxis 0.48 micrometers.The Earth system radiates as a blackbody at a temperature of T = 255 kelvins so that the Earth’s λmaxis 11.4 micrometers.

Question

a. The Sun’s radiationis most intense in the [(ultraviolet) (visible) (infrared)(microwave)] portion of the electromagnetic spectrum.

b. The Earth’s radiation is most intense in the [(ultraviolet) (visible) (infrared) (microwave)] portion of the electromagnetic spectrum.

Answer 1

just review the wavelengths for the parts of the spectrum.

Answer 2

This question is so important to us that I am going to answer it just to make sure you know.
Radiation comes in from the sun in a wide spectrum but maximum ultraviolet although as you know there is lots of visible. That energy mostly gets used to power things like plants and animals and soil on earth and warm things up.
Those warm things radiate back out toward space maximum in the infrared (heat) wavelengths.
The balance between that incoming short wavelength power and the outgoing infrared power to a great extent determines the temperature of earth's surface. If something (like CO2 or Methane) in the atmosphere hinders the radiation of that infrared out toward space, the earth surface gets warmer.

Answer 3

a. (ultraviolet)
b. (microwave)