We'd have to say that there are no apparent errors
in any list that accompanies the question.
By frequency on the electromagnetic spectrum
Electromagnetic waves are classified according to their wavelength and frequency and this classification is called electromagnetic spectrum.
The "color" is really a wavelength. The electromagnetic spectrum determines this, every different wavelength has a corresponding color. Red being the longest, and violet being the shortest. This electromagnetic spectrum also determines whether it is visible, ultraviolet, infrared, and so on.
All waves of the electromagnetic spectrum have the same speeds but different frequencies and wavelengths. So, wavelength is important for defining the regions in the electromagnetic spectrum (frequency would have been equally useful)
The speed of electromagnetic waves in a vacuum is the same as the speed of light (which is, in itself an electromagnetic wave). It can be measured by finding the frequency and wavelength of two different waves, and then by that correlation, the speed of the waveform.
electromagnetic spectrum
Electromagnetic spectrum have different electromagnetic waves classified orderly according to their wavelength or frequency.
By frequency on the electromagnetic spectrum
wavelength
The electromagnetic spectrum organizes different types of electromagnetic waves according to their wavelength or frequency.
It has a different wavelength and frequency.
Electromagnetic waves, just like light, but with different frequency and wavelength.
electromagnetic spectrum
Electromagnetic waves are classified according to their wavelength and frequency and this classification is called electromagnetic spectrum.
Frequency and so wavelength
Yes. The shorter the wavelength of an electromagnetic wave, the higher its frequency is. Don't confuse frequency with velocity! All electromagnetic radiation travels at the same rate, C (3*10^8) m/s.
The "color" is really a wavelength. The electromagnetic spectrum determines this, every different wavelength has a corresponding color. Red being the longest, and violet being the shortest. This electromagnetic spectrum also determines whether it is visible, ultraviolet, infrared, and so on.