If light is looked upon as a stream of particles, or quanta, what are the particles called?________
查看答案
A unique property of an electromagnetic wave is its ability to travel through________.
The part of the electromagnetic spectrum we see is called the________.
Waves 750 nanometers in length are associated with what color?__________
The retina is a photosensitive________.
微信支付 
支付宝支付