Revise GCSE Physics

Question:How is infrared radiation used in short distance data links?

Actually a remote control counts as a short distance data link.

Some mobile phones have an infrared data port. Information is sent in exactly the same way as the much shorter sequences used by a remote control.

Some companies use infrared lasers to transfer information through the air between the buildings at roof level.

This eliminates the need to put in cables between buildings.