What is the small dot on airplane window?

These tiny holes, also called breather holes, serve as a safety function, by making sure that the outer pane bears all the air pressure (the pressure inside the cabin is much higher than outside). This also ensures that in case the pressure difference becomes high enough, it is the outer pane that breaks off first.



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By pressing the control button at the bottom of the window, passengers are able to activate that electrochromic technology, sending an electric current through the gel sandwiched between the glass panels. The strength of the current determines the darkness of the reaction in the gel.

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Some aircraft damage from lightning strikes includes broken lighting and windows, deformed antenna placements, and onboard electronics malfunctions. Other abnormalities or warnings on the flight deck, such as cabin air pressurization problems or false alarms, can occur after your airplane has been struck by lightning.

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The study found that flying in a cockpit for 56.6 minutes at 30,000 feet exposed pilots to the same amount of UV-A radiation as a 20-minute tanning bed session.

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UVA penetrates deeper into the skin causing damage to the skin collagen and elastin, resulting in premature skin ageing and can also cause skin cancer. A study in 2015 found that, compared with the general population, pilots and cabin crew had around twice the rate of melanoma.

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