Electro-magnetic wave.
However, normal light waves reach our eyes on a variety of different planes.
LASERS put all normal light waves into ONE plane.
The difference with POLARISATION ( e.g. sun glasses). is that the waves in one given plane are allowed to pass. Light waves from all other planes are blocked. That is not all waves are allowed to pass.
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For a particular type of wave, in a specified medium, the multiple of the two is a constant.
Fourier analysis shows that the saw wave is constructed through manipulation of a sine wave, I can't remember the maths behind it but it's definitely a sine wave.
You would have to know the medium and the type of wave.For example a sound wave with a period of 10 seconds would be well down in the infrasonic. In sound, a 1kHz wave has a wavelength of ~1 ft. A 1 Hz wave would have a wavelength of ~1000 ft. A 0.1Hz wave has a wavelength of ~10 000ft.BUT, if it were a compression wave in an earthquake, one would be dealing with swampy ground.A wave at sea in deep water (mid Pacific or mid Atlantic) could have such a period. An e-m wave of 0.1Hz would have a wavelength well towards our Sun.And not all media have a uniform wave velocity. e-m waves at very low frequencies travel much slower than the common ones - at least around the earth. And you know that all colours of light do not travel at equal speeds in glass.
Both the wavelength and the frequency of a wave affect the speed of a wave.
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