Dark matter does not interact directly with electromagnetic radiation, such as light or other forms of electromagnetic waves. It does not emit, absorb, or reflect electromagnetic radiation in the same way that ordinary matter does.
The primary evidence for the existence of dark matter comes from its gravitational effects on visible matter and the large-scale structure of the universe. Dark matter interacts only through gravity and does not participate in the electromagnetic force, which is responsible for interactions between charged particles and electromagnetic radiation.
Because dark matter does not interact with light, it does not emit or scatter photons. This property makes dark matter challenging to detect directly using traditional astronomical observation methods, which rely on detecting and analyzing electromagnetic radiation. Instead, scientists primarily infer the presence of dark matter through its gravitational effects on visible matter and the motion of stars and galaxies.
Various experimental approaches, such as direct and indirect detection experiments, are being conducted to search for potential dark matter particles that may have weak interactions with ordinary matter. These experiments aim to detect the indirect effects or signals resulting from the interaction of dark matter particles with visible matter, rather than directly observing the dark matter particles themselves.
Understanding the nature of dark matter and its interactions is an active area of research in astrophysics and particle physics, and ongoing studies and experiments are striving to uncover the properties of this mysterious substance.