LT: impacts of electromagnetic radiation

Question 1

applications of infrared radiation

Answer 1

1. in thermal imaging cameras to screen people for fever
2. in intruder alarms using passive infrared detectors
3. in remote controllers to control electrical devices

Question 2

harmful effects of infrared radiation

Answer 2

1. overexposure can damage our eyes
2. infrared radiation trapped in the atmosphere can cause global warming

Question 3

applications of visible light

Answer 3

1. allows plants to photosynthesize
2. allows us to carry out our daily activities with the ability to see clearly
3. in optical fibres for medical purposes and telecommunications

Question 4

harmful effects of visible light

Answer 4

1. can cause chemical changes in some materials, resulting in deterioration of their quality
2. causes light pollution, which negatively impacts migration, reproduction, sleeping, searching for food and escaping from predators

Question 5

applications of ultraviolet (UV) light

Answer 5

1. exposure allows our bodies to produce vitamin D
2. used to disinfect medical equipment, food and water

Question 6

harmful effects of ultraviolet (UV) light

Answer 6

overexposure can damage our eyes and cause skin cancer