The Source of the Beams of Electromagnetic Radiation (Including Light

question 199

Multiple Choice

The source of the beams of electromagnetic radiation (including light in some cases) emitted by pulsars is

• A) charged particles traveling along the magnetic axes of rotating neutron stars; the particles emit light as they are accelerated.
• B) electrons flowing out along the rotation axis of an accretion disk around a neutron star; the electrons are accelerated and hence emit light.
• C) the surface of a normal star that has a white dwarf companion; the white dwarf creates a hot spot on the normal star that emits a beam of light as the stars rotate around each other.
• D) jets of material flowing out along the rotation axis of the accretion disk around a black hole; collisions in the jets heat the material and produce light.

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