S 1 : The coming of the computer sparked the need for remotely operated controls. P: It is silicon chip that is at the heart of the remote control. Q: This produces an infra-red beam, which is made up of electromagnetic waves. R: When you press the button on the remote control, the chip sets off an electronic vibration. S: The beam carries a coded signal such as switch on, raise volume, etc. S 6 : The code is based on binary digits. The Proper sequence should be: