Why Do Airplanes Have Round Windows?

Let's find out the reason here.

Why Do Airplanes Have Round Windows?
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If you have been traveling through planes often, you might have observed that the windows of the plane are round or slightly curved. But have you wondered why the windows are round and not rectangular? The answer behind the round shape of windows is quite interesting.

Check out the answer here!

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Earlier, airplanes did not have round windows.

Earlier, airplanes did not have round windows.

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They had square windows just like we have at our houses and cars.

They had square windows just like we have at our houses and cars.
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Then what changed the shapes of the window?

Then what changed the shapes of the window?
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With the progress in technology, the size of the plane was changed along with the shape of windows in order to carry more passengers.

In 1953 two airplanes fell apart in the air and killed 53 passengers.

In 1953 two airplanes fell apart in the air and killed 53 passengers.
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Do you know the reason? 

Do you know the reason? 
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The reason was the square shaped windows.

Any object with corners is weak and are more sustainable to get affected under pressure.

Any object with corners is weak and are more sustainable to get affected under pressure.
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And similar is the case with rectangular windows.

And similar is the case with rectangular windows.
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Rectangular windows have four corners which mean it has four potential weak points which can crash down under stress.

It was found that rectangular windows can crash down by air pressure but not the round one.

It was found that rectangular windows can crash down by air pressure but not the round one.
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When the window is slightly curved or round, the probability of the window getting crushed decreases.

When the window is slightly curved or round, the probability of the window getting crushed decreases.
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Here is a video which explains the logic behind round windows in airplanes.

Was the answer clear to you?