In addition, some materials absorb, rather than reflect or pass, sound waves.

And why other materials do not absorb the microwave energy?

How do you predict what materials will absorb what frequency energy?

The signal from the tube is then used to calculate the dose that the material had absorbed.

There are several ways in which a material can absorb sound.

Simply put, heat capacity is the amount of heat that a material can absorb from another medium.

Some material can easily absorb infrared radiation, and some cannot.

The material can absorb many forms of energy including sound and blast.

An object's color results from the way the materials at its surface reflect some wavelengths of light and absorb others.

Other materials can also absorb chemicals, but at higher cost.