Multiple choice

According to Einstein's theory of relativity, when a body moves with a velocity comparable to the velocity of light, its

  1. mass and length decreases

  2. mass and length increases

  3. length increases but mass decreases

  4. length decreases but mass increases
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

According to the special theory of relativity, as an object approaches the speed of light, its length contracts in the direction of motion while its relativistic mass increases. Therefore, length decreases and mass increases.

Keep practicing — related questions