Multiple Choice
In 1908,Hale noticed that the spectral lines from sunspots were split into closely spaced components,and he concluded that the magnetic fields in the sunspots must be very strong.What is the name given to this effect?
A) the photoelectric effect
B) the Hale effect
C) the Doppler effect
D) the Zeeman effect
Correct Answer:

Verified
Correct Answer:
Verified
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