Plane equipment cross-examine?

Does anyone know why you are required to put your window up for taking off and landing within planes?
Answers:
If you have your glass down ( when you take off its tremendously bumpy) it could shatter the plastic pretector. you also need them up coming in to come to rest.
It is so surrounded by the event of an emergency the flight crew doesn't have any obstructions when viewing the outside of the aircraft. They necessitate to be able to see fire, water, and anything else that may be cruel in an emergency evacuation.
Safety.In the event of a landing or take of crash,you can look outside to see if there is a fire.
Just who is requiring this?

I suspect this is another of those questions roughly speaking flying that stems from false information. Many aircraft have no windows to enlarge or close, as the pilot and any passengers are out in the unscrew always.
Jason's got it right...

BG - what contained by the heck are you talking about?

Ben - concrete bad answer.

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