Praxis 5511 Practice Test Practice Question
An extremely massive star can collapse until it is so dense that nothing, not even light, can escape from its immediate vicinity. This type of object is called a
Correct Answer: D
Rationale: A black hole forms when an extremely massive star collapses under its own gravity, creating a region where the gravitational pull is so strong that not even light can escape.
Option A, pulsar, refers to a rotating neutron star that emits beams of radiation, not a collapsed star with an escape velocity exceeding light speed.
Option B, nebula, is a cloud of gas and dust in space, often a site of star formation, rather than a collapsed stellar remnant.
Option C, white dwarf, is the final stage of a medium-sized star, which has shed its outer layers and does not possess the density to form a black hole.
Unlock All Questions
Subscribe to Premium for full access to all practice questions, detailed rationales, and performance tracking.
Subscribe Now