why does the screen of a television set crackle when a sweater is brought near it?

Question

this is a science question on advanced physics

Answer 1

Basically...the sweater has static electricity and when brought close to the boob tube...it causes the electricity from the sweater to react with the TV tube electricity!!!

Answer 2

Television sets, at least the standard cathode ray types, emit a lot of static electricity (it's why they also attract a lot of dust). I have no idea why, but I do know it to be a fact (color sets emit more than black and white sets, not that there are many of those around anymore). Nearly anything that can be charged will crackle when brought near a screen (your hand, for example), but something like a sweater, depending on the fabric, has its own qualities.

Answer 3

Static Electricity

Answer 4

The image on your TC screen is created by electron beams that stimulate the phosphor pixels on the screen. Because of this flux of electrons that have nowhere to go, the screen builds up a negative charge (electrons are negatively charged).

You sweater has the capacity to store a lot of electrons, so when it touches the screen, the electrons from that part of the screen escape to the sweater. So that part of the screen get de-charged.

Now the electron beams gets disturbed by this un-even distribution of charge on the screen. The beams are supposed to be directed towards those parts of the screen that must show the lighter part of the image, but now they also come under influence of the uneven distribution of the charge on the screen.

Answer 5

This is because there are static eletricity on the surface of the television. Much like the static eletricity in clouds. You can see the crackles as micro thunders.

Answer 6

on account that a common television set has a rectangular exhibit screen, the perimeters meet at an exact attitude and also you'll use the Pythagoras equation to determine this. c^2 = a^2 + b^2 on account that c is the diagonal, you comprehend it really is 25. If a is the width and b the height, you comprehend b = 0.75a. something else is elementary math.

Answer 7

its a result of static electricity. Its perfectly harmless. Try this test. Find a metal bar, such as bike handle bars, put some rubber sole shoes on then rub them on the carpet, then touch the metal bar, you'll get a tiny static electricity shock. It won't hurt u, its actually a bit of fun, try it on your friends.

Answer 8

Static electricity, I think?

Answer 9

because of the static electricity

Answer 10

release of static electricity