Infrared

• What type of radiation do all objects emit?

  Infrared radiation
• How does the temperature of an object affect its infrared radiation emission?

  Hotter objects emit more infrared radiation
• What effect does infrared radiation have when absorbed by skin?

  It can damage, burn, or kill skin cells
• What is one application of infrared radiation in communication systems?

  Used in optical fibres
• Why is infrared radiation preferred in optical fibres?

  It is absorbed less
• What do remote control handsets use to transmit signals?

  Infrared radiation
• Why are infrared pulses suitable for remote controls?

  They can be easily produced and detected
• What is the use of infrared scanners in medicine?

  To detect infrared radiation
• How is infrared radiation used in heating objects?

  It heats up objects quickly
• What type of heaters use infrared radiation?

  Electric heaters