Dark spots on the photosphere are known as

a. the corona.

b. solar wind.

c. sunspots.

d. the chromosphere. user: which type of electromagnetic radiation cannot be focused?

a. gamma rays

b. ultraviolet

c. infrared

d. x-rays

the darkspots on the photosphere are known as : C. sunspots this phenomenon happened because reduced surface temperature cause a concentration of magnetic fluc. The type of electromagnetic radiation that cannot be focused is : A. gamma rays gamam rays caused the electric fluctuation in the field to be much faster than the electron distribution, making it unable to be focused