You are presented with the question "What emits light waves?" and the following answer choices: 
- an object
 - a radio
 - sensory neurons
 - solid, liquid, gas
 - a chair
 - a flashlight
 - harmful substances
 - a rock

Now knowing that aflashlight converts chemical energy into light energy and light is electromagnetic energy in the form of waves, choose the best answer.


 

      a flashlight   