Why do scientists think that dark matter does not interact through the electromagnetic force?
A) because, if it did, it would absorb or emit photons
B) because it exists too far out into space
C) it exerts no gravitational pull on other matter
D) there is too little of it to exert an electromagnetic force
E) all of these are correct

Question

Quizplus · Accepted Answer

Scientists think that dark matter does not interact through the electromagnetic force because if it did, it would absorb or emit photons. This means that if dark matter did interact through the electromagnetic force, we would be able to detect it by observing the effects it has on light in the universe. Since we have not been able to detect such effects, scientists have ruled out the possibility that dark matter interacts through the electromagnetic force.

Why Do Scientists Think That Dark Matter Does Not Interact