do you reckon light and or sound could be used as a weapon in war?

Question: do you reckon light and or sound could be used as a weapon in war?
- Keywords:
  light,
  sound,
  war,
  weapon
Asked by FUTURE GAMER to Ellen, Elliot, Hazel, Rupesh, Thomas on 20 Jun 2016.
- Thomas Biggans answered on 20 Jun 2016:
  
  Yes they already exist.
  
  Light is already being used as a weapon in the form of a giant laser.
  
  And there are some experimental weapons based on sound.

Question: do you reckon light and or sound could be used as a weapon in war?