Sunspots are cooler than the rest of the Sun's surface,sometimes by as much as 1500 K.What would be the peak wavelength of the radiation from the sunspot,when compared to that from the rest of the Sun?
A) It would be at a shorter wavelength.
B) It would be at a longer wavelength.
C) It could be at a shorter or longer wavelength,depending on the position of the spot.
D) It would be the same because the light still originates from the hydrogen gas of the Sun.

Question

Quizplus · Accepted Answer

The peak wavelength of radiation is determined by the temperature of the source, with hotter objects producing shorter wavelength radiation and cooler objects producing longer wavelength radiation. Since sunspots are cooler than the rest of the Sun's surface, the peak wavelength of radiation from the sunspot will be at a longer wavelength than the rest of the Sun. This is known as Wien's displacement law.

Sunspots Are Cooler Than the Rest of the Sun's Surface,sometimes