A. protons
B. electrons
C. cosmic rays
D. None of the above
✅ The correct answer is option C.
The subatomic particles arriving from outer space having high energy are called cosmic rays. High-energy particles arriving from outer space are mainly (89%) protons – nuclei of hydrogen, the lightest and most common element in the universe – but they also include nuclei of helium (10%) and heavier nuclei (1%), all the way up to uranium.
The subatomic particles arriving from outer space having high energy are called cosmic rays. High-energy particles arriving from outer space are mainly (89%) protons – nuclei of hydrogen, the lightest and most common element in the universe – but they also include nuclei of helium (10%) and heavier nuclei (1%), all the way up to uranium.