The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio waves, microwaves, visible light, ...

Does light behave more like a particle, or like a wave? Today we know the surprising answer. Here's why it took so long to ...

Unlike a sound waves, light waves do not need a medium ... Light travels in a straight line. When drawing a light ray: Use a ruler and a sharp pencil to draw a straight line.