Q. Universal time is based on
A) Rotation of earth on its axis
B) Oscillations of quartz crystal
C) Vibrations of cesium atom
D) Earth’s orbital motion around the sun
Explanation
Time defined in terms of the rotation of the earth is called universal time (UT).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.