In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[EX Q]: Question: When Derek was observing waves, he noted that some had more energy than others. The waves with less energy had particles that were 
 Answer: closer
[EX A]: The more energy the wave has, the farther the particles of the medium move.

[EX Q]: Question: Don is looking at electromagnetic waves, and sees that the one's he observing have higher frequencies. Don is able to know then that the photons have energy that is 
 Answer: higher
[EX A]: In electromagnetic waves with higher frequencies, photons have more energy.

[EX Q]: Question: For radio transmissions, longer wavelength waves have 
 Answer: lower frequencies.
[EX A]:
Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies.