Neither the amplitude nor the speed does.
Visible light. The higher the frequency, the shorter the wavelength.
black
Different wavelengths of light have different colors.
very roughly 350 to 750 nanometers
The longest visible wavelength is that of the last color you can see on thered end of the rainbow. It's not exactly the same for every individual's eyes.
Yes.
No, frequency and wavelength of visible light are directly related through the speed of light in a vacuum. The frequency of visible light waves is inversely proportional to their wavelength: shorter wavelengths have higher frequencies and vice versa. This relationship is described by the equation c = λν, where c is the speed of light, λ is wavelength, and ν is frequency.
Violet, with a wavelenght between 380 and 450 nm, which is near the end of the visible light, next to the ultraviolet region. Be careful because talk about "colors" is quite dangerous. Firstly, different cultures has different names for the same color. In addition to this, due to the fact that the electromagnetic spectra is continuous (i.e., there are infinite's wavelenghts) it is impossible to say exactly which wavelenght is the limit of the visible region and, consequently, which is the color associate to this wavelenght. Usually (but it is a convention) it is said that visible region is between 380 and 750 nm.
no
255 nanometers is 0.000000255m
The Wavelenght of microwaves is between 1m to 1mm, the visible light has a wavelength of ca 350nm-750nm. A Short wavelenght means a high frequency and fequency indicates a high energylevel. Therefore Micorwaves have a verylow energy, comparet with the normal light. So: It is harmless! Neramo
400 to 700 nm because white light is the mixture of all 7 coloured lights.