The black hole is ( ), and no particle or electromagnetic radiation can escape from it.
举一反三
- What kind of wave does ultrasound belong to and has certain radiation? A: Electromagnetic wave B: Mechanical wave C: Particle wave D: Light wave
- When these electromagnetic waves escape from the conductor into space, they are said to be radiated by the conductor, hence the name radio waves.
- The deer ran very fast and just in time to escape from the lion running after it.
- Which one in the following is not one of the categories of wireless charging? It is _____. A: electromagnetic radiation B: inductive coupling C: magnetic resonant coupling D: electromagnetic induction
- Which type of radiation do we use for bone metastatic tumor treatment（ ） A: Beta particle B: alfa particle C: Gama particle D: A and B