Can someone explain in terms of physics why or why not a strong magnet can damage...

Can someone explain in terms of physics why or why not a strong magnet can damage a laptop screen.

Expert Solution

The display systems available are LED, LCD and Cathode ray tube.

LED and LCD are based on liquid crystal crystal displays. But LED's use light emitting diodes for back light whereas LCD displays use fluorescent lights.

CRT uses cathode ray tube uses electrons, electric field and magnetic field to produce the image.

LED and LCD do not anything that is sensitive to magnetic field, but CRT's are based on electric and magnetic fields. The E and B fields precisely adjust the electrons path to form an image. These electrons land on a screen coated with the phosphorous. This emits various colors and forms a picture. Now when a strong magnetic field is applied, the electrons experience the force and they path is bent. This causes the electrons to land in the wrong places and thus causing a distortion in image. This is the reason why CRT monitors show disoriented images when a strong magnetic placed in front of them. But switching off the CRT or the monitor several times fixes the problem.

In case of LED and LCD, they are not based on Electric and magnetic fields. So they are not damaged by the strong magnets.

genius_generous answered 2 years ago

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