Question

Which of the following everyday phenomenon are based on the Faraday's effect? a. using your TV remote to turn it on and off b. reading data from your computer's hard drive c. playing a CD/DVD swiping your credit/debit card at the market d. playing one of your parent's ancient VHS tap.

Answer 1

Answer:

b. reading data from your computer's hard drive

Explanation:

Reading data from compact hard disc is an operation which is based ob kerr effect or Faraday effect . This effect involves rotation of plane of polarization of light when light passes through  a magnetic field. In order to read data from disc , a low intensity laser light is made to fall upon the disc . On reflection,

the plane of polarization of laser light  is rotated . The extent of rotation depends the extent of magnetization of magnetic disc. In this way information stored in the form of magnetic field is converted into information in the form of light .