space hard MCQ

Gamma-ray bursts (GRBs) are classified into short and long duration based on which threshold?

  1. 1 second
  2. 2 seconds
  3. 10 seconds
  4. 60 seconds

Answer: 2 seconds

Short GRBs (<2 s) originate from compact object mergers; long GRBs (>2 s) from collapsars/massive star deaths, differing in progenitors and host galaxies.

Topic Astronomy - High Energy
Exam Relevance UPSC Prelims, General Science