Why do you have to turn off cabin lights when landing?
Answers:
other people have answered this and they are correct.cabin lights are dimmed prior to takeoff and landing to ensure that all illuminated signs are more clearly visible. This includes seat belt and no smoking signs as well asl exit lighting, emergency pathway lighting and exterior emergency lights (they shine through emergency exits when they are opened so you can see where they are at night, and are sometimes referred to as "shark lights")
pilot say so.
I presume it is to let people know that they should definitely be in their seat with the belt on. It may also be to do with reducing risk of fire should something go wrong.
This question came up between a friend and I once and she checked out one of the airlines to find out.
Apparently it has to do with safety procedures. Having the lights off will allow for the cabin crew to easily see what is wrong in an emergency. Eg, if anything like engine on fire is going on.
Otherwise you would have the brighter on the inside than the outside thing and it will be diificult to see your surroundings outside. Especially at night!
My guess is that the engines are being throttled back to a fraction of their total power right before they land. Since all electricity is generated by the engines, the available electricity is cut by the same fraction. Therefore, the pilot has to cut back on nonessential drains on the electricity, and the cabin lights are a big one. No one needs to read or have the lights on while landing, but the pilot has to make sure the engines, landing gear, and navigation systems all have enough juice.
Once you're on the ground, the electricity goes to backup or battery, and there's enough juice to run the cabin lights. Plus, non cabin lights are essential, since you need them to deboard the plane.
My guess.
The cabin lights are turned off in darkness due to that a plane is at it's vulnerable on take off and landing. By dimming the lights, your eyes become accustomed to the dark and emergency exits are easily recognised as they are illuminated.
the light wakes the pilots
or the captain will get his wages docked for leaving the lights on.
It is a critical phase of flight and its used to keep the cabin orderly and quiet.
-So that the hanky--panky set can get their clothes back on. No really it is for safety. If something should require emergency evacuation of the aircraft, your eyes will be more adjusted to the darker environment.
Safety issue. The lights are dimmed during takeoff and landing so the passengers eyes become acclimated to the darkness. This is so they can see the emergency/exit signs if an crash or accident occurs.
Next time you are on a flight try to count how many emergency signs are visible when you first get on. Then the lights are dimmed count them again, the number should be much greater once your eyes get used to the dark :)
To reduce power consumption. If the pilot has to abort the landing he may need as much thrust as possible from the engines. The electricityis generated from the engines so they reduce thrust
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