NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 71

The speed of light in vacuum is estimated as ______ meters/second.

  1. 3.00 × 10^8

  2. 3.10 × 10^8

  3. 3.12 × 10^8

  4. 3.15 × 10^8

Show answer & explanation

Answer: (A) 3.00 × 10^8

Explanation

The speed of light in vacuum is about 3.00 × 10⁸ m/s (exactly 299,792,458 m/s).