Multiple choice general knowledge science & technology

When someone can invisible?

  1. if light falling on body could be reflected upto 85%

  2. if light falling on body could be reflected upto 100%

  3. if someone travels with a speed of superjet

  4. its impossible
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For an object to be invisible, it would need to reflect nearly 100% of light falling on it (or absorb and re-emit it perfectly), making it undetectable to the human eye. 85% reflection is insufficient, and traveling at high speed doesn't make things invisible.

Keep practicing — related questions