# GENERAL KNOWLEDGE

## GK

### PHYSICS

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of these provides the best analogy for what massive objects do to spacetime?
 A coat hanger in the closet B bowling ball on a rubber sheet C car driving in a circle D tennis ball in the dryer
Explanation:

Detailed explanation-1: -Answer: Gravitational waves are ripples of spacetime caused by the motion of massive objects (the more massive the object, the greater the ripples). They travel at the speed of light but are so weak that they have not yet been detected.

Detailed explanation-2: -Large objects such as the Sun and planets aren’t the only masses that warp the fabric of space-time. Anything with mass-including your body-bends this four-dimensional cosmic grid. The warp, in turn, creates the effect of gravity, redirecting the path of objects that travel into it.

Detailed explanation-3: -One common analogy used to introduce general relativity is the idea of a “mass on a rubber sheet” or “bowling ball on a trampoline”. The bending of the surface caused by the mass pulling the sheet down is used to illustrate the curvature of spacetime in general relativity.

Detailed explanation-4: -Essentially, Einstein thought space and time were intertwined in an infinite “fabric, ‘’ like an outstretched blanket. A massive object such as the Sun bends the spacetime blanket with its gravity, such that light no longer travels in a straight line as it passes by the Sun.

There is 1 question to complete.