Effect of gravity on time: Gravitational time dilation

Have you seen the movie Interstellar 2014. In this movie, it is shown that 1 hour of earth is equal to the 7 years when the surface gravity is 130% of that of Earth's. So what I mean that if we spend 1 hour in the planet shown in that movie. that will be equal to 7 years of earth time or duration. Amazing isn't.

Have you seen the movie Interstellar 2014. In this movie, it is shown that 1 hour of earth is equal to the 7 years when the surface gravity is 130% of that of Earth's. So what I mean that if we spend 1 hour in the planet shown in that movie. that will be equal to 7 years of earth time or duration. Amazing isn't.

Lets see what other people around the world think about it on Internet.

## Effect of gravity on time

The image below shows how a massive object bends the space around it.

For example, in going from point A to point B, if there wasn't any massive object present, the path followed would be the one shown in green as then, there is no bending in the space fabric. But now, when the massive body is present, it will bend the fabric (which we perceive as gravity) and hence, it would follow the yellow path i.e. a longer path. So basically, gravity affects the space around it.

Now, just like space, time is also a dimension! (It's hard for us to imagine it just a dimension like space, but it is!) So when space (three dimensions) is affected by gravity, then time (the 4th dimension) should also be affected.

Now, as shown above, the green path is shorter in length than the yellow path i.e. in presence of gravity the space dimension is stretched! Similar is the case with time, time also gets stretched in presence of gravity. In other words, time runs slower in presence of gravity.

## Gravitational time dilation

There are many things that affects time dilation. The time dilation due to gravity, Einstein’s General theory of relativity and Time dilation due to the speed, Special theory of relativity.

1) Gravity of the planet itself,

The planet Miller’s gravity is merely 30% more stronger than Earth’s gravity pull. This won’t slow down time to this extend.

2) Speed of the planet,

The planet is orbiting around the supermassive blackhole at 55% of speed of light. According to special theory of relativity, time slows significantly when the speed of the object approaches the speed of light. However, I ran the math on Einstein’s equation of time dilation due to speed, it turns out, this will only cause time dilation on the planet upto 14% to 15%.

3) Gravity of the nearby heavy object, in this case, the blackhole, Gargantua’s Gravity.

The planet is in deep gravity well of the blackhole that has mass of 100 million Sun, spins at 99.8 % of sped of light. It can actually drag the space-time around it. The miller’s planet is extremely closed to the blackhole. This is the main cause of time dilation of Miller’s planet.

The commutative effect of 2, and 3 results into time runs way slower, approximately 61,000x slower, at the planet than the rest of the universe. 1 hour on the planet is equals 7 years on the earth.

The above phenomenas are not just theoretical concept or figment of imagination but practically proven. The GPS satellites orbiting the earth have to adjust their clocks periodically due to the time dilation.

### Gravitational time dilation - Theory

Same is true with light.....A light rays travelling far from distant star in universe get bend by the gravitational pull of massive stars like our sun. So, a observer from earth observing a star seems that the star is in apparent position but the actual position of star will be different. This is true with nearer stars.For those stars which are thousand light years away from us, we could never find the real time status of that stars as the light rays reaching our eyes of that star is the status of that star which was thousand years before. So in other words we are looking into past.

### According to Wikipedia theory

What is time?

Time is a dimension. It is a way to measure the progression of events. What is a second is a better topic to help you understand time.

The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.

Does time slow down when gravitational force is exerted on it?

Yes it does.

When time enters a black-hole, the gravitational force exerted by the black hole causes time to slow down considerably.

We are used to the pace of time on earth. We know earth's gravity affects time too, just that we don't experience it as we are adjusted to that pace of time. Atomic clocks at different intensities of gravity have shown difference in pace of time.

So There is honestly no simple way to explain this.

Some also says that the movie is full of events based on misunderstandings of physical rules. It is more like a movie that promotes NASA. But there are some reasons to believe, & some dosen't mean any thing. But thank you for reading this post. If you have any thing else to say, do it in comment area.

http://en.wikipedia.org/wiki/Gravitational_time_dilation
http://www.wired.com/2014/11/time-dilation/

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MindxMaster: Effect of gravity on time: Gravitational time dilation
Effect of gravity on time: Gravitational time dilation
Have you seen the movie Interstellar 2014. In this movie, it is shown that 1 hour of earth is equal to the 7 years when the surface gravity is 130% of that of Earth's. So what I mean that if we spend 1 hour in the planet shown in that movie. that will be equal to 7 years of earth time or duration. Amazing isn't.
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