Question

question 4
light: a range of energy waves
light waves travel in straight lines until they strike a surface. when light waves strike a surface, three things can happen. the light waves may be absorbed by the surface, bounce off the surface, or pass through the surface. the bouncing of light waves off of an object is reflection.
visual objects are seen when the reflected light waves strike someones eyes. a mirror is an example of this. refraction is the bending of light, and takes place when light waves travel through two different transparent materials. observing a straw in a glass of water appearing to bend would be described as refraction, or the bending of these energy waves.
the range of energy waves that includes all visible and invisible light waves is called the electromagnetic spectrum. waves in the electromagnetic spectrum are arranged by the amount of energy they have.
gamma waves are extremely powerful, and have the most energy of all the waves in the electromagnetic spectrum. they are used to fight types of cancer. another type of wave is x - ray. these easily pass through skin, but not bones. uv (ultraviolet) waves are
waves in the electromagnetic spectrum are arranged by —
select one
the way they bend
the way they are absorbed
the things they are used for
the amount of energy they have

Explanation:

The electromagnetic spectrum arranges waves based on their energy levels. Gamma - rays have high energy, X - rays can penetrate skin, etc. This is the organizing principle for waves in the electromagnetic spectrum.

Answer:

the amount of energy they have