Knowing a little about the tech, you are going to have range and penetration issues in certain frequencies.

This means that objects absorb certain frequencies of light more than others.

There was a photon with a certain frequency and now it has been taken away.

A tone is a sound that repeats at a certain specific frequency.

Some materials are opaque to certain frequencies of light and transparent to others.

When you hit the balloon, it vibrates at a certain frequency.

Specifically, the hearing focused on certain frequencies of around two billion cycles per second.

How is it that a particular substance can reflect a certain frequency of light?

The thing is, robots can only see in certain frequencies.

However, once a certain frequency was reached, even low intensity light produced electrons.