Which of the following makes up a significant amount of hot dark matter?
A) axions
B) neutrinos
C) photinos
D) photons

Question

Quizplus · Accepted Answer

Neutrinos make up a significant amount of hot dark matter. Unlike other particles like axions, photinos, or photons, neutrinos have mass and can contribute to the overall density of dark matter in the universe. However, they are considered "hot" dark matter because they were moving at high speeds during the early universe and thus do not cluster as strongly as other forms of "cold" dark matter.

Which of the Following Makes Up a Significant Amount of Hot