You are presented with the question "what is a laser used for producing?" and the following answer choices: 
- Electrical energy
 - electricity
 - electron microscope
 - density
 - light bulbs
 - rays or beams
 - sounds
 - hydrogen and oxygen

Now knowing that alaser is used for producing light and light seems to travel in rays or beams, choose the best answer.


 

      rays or beams   