The amplitude of the fundamental ('first harmonic') component of the triangular wave is 0.8107 of the whole composite triangle's amplitude. So the composite wave's amplitude is 1.234 times the amplitude of the fundamental. (Both are rounded.) (The amplitudes, not the triangle.)
fundamental mode
frequency lowest
5 meters
dissonance
A square wave is the sum of all odd harmonics of the fundamental frequency.A sawtooth or ramp wave is the sum of all even harmonics of the fundamental frequency.
A square wave contains many higher harmonics of the fundamental. A much higher frequency, a harmonic of the fundamental, is what causes the fast slew rate of the square wave edges
The amplitude of the fundamental ('first harmonic') component of the triangular wave is 0.8107 of the whole composite triangle's amplitude. So the composite wave's amplitude is 1.234 times the amplitude of the fundamental. (Both are rounded.) (The amplitudes, not the triangle.)
the sound produced by a guitar string: the fundamental wave is a standing wave (its harmonics too).
fundamental mode
The fourier series of a sine wave is 100% fundamental, 0% any harmonics.
frequency lowest
Yes. Wavelength is one of the fundamental variables in describing a wave.
diffraction
Harmonics are multiples of the fundamental frequency of the wave.
A sine wave has no harmonics. It only has a fundamental, so the value of the 2nd, 3rd, and 12th harmonics of a sine wave is zero.
5 meters