Question

PLEASE HELP FAST !!!!!!!!!!!!!!!!!!!Which of these is the most likely use of an electromagnetic wave which has frequency lesser than ultraviolet rays but greater than infrared radiations?
a-heat food safely
b- make objects visible to humans
c-transmit radio and cellular phone signals
d- detect the location of objects which emit heat

Answer 1

Could be the answer c 

Answer 2

Answer;

b- make objects visible to humans

Explanation;

• Visible light is the electromagnetic radiation in the range of the EM spectrum between the infrared and the ultraviolet waves.
• Visible light is the radiations that is visible to human eyes. Anything that glows or gives off light makes waves of visible light.
• Visible light is important to human beings as without light we wont be capable to see anything. Additionally, visible light is also used in lasers that are used in surgery, CD players and laser pointers.