Question

the complete range of electromagnetic waves placed in order of increasing frequency; visible light; amplitude; trough; electromagnetic spectrum

Explanation:

The question is about identifying the term for the complete range of electromagnetic waves ordered by increasing frequency. The options are "Visible Light", "Amplitude", "Trough", and "electromagnetic spectrum". The electromagnetic spectrum is defined as the entire range of electromagnetic waves arranged by frequency (or wavelength). Visible Light is a part of the spectrum, Amplitude is a wave property, and Trough is a part of a wave's structure. So the correct term is "electromagnetic spectrum".

Answer:

electromagnetic spectrum