That's impossible to say with the information provided in the question; Hertz is cycles per second and nanometers is a measure of length...
400 nanometers = 4.0 × 10-10 kilometers
it is not knowlageable to me
The wavelength of an ultraviolet wave typically ranges from about 10 nanometers to 400 nanometers. This places ultraviolet waves just outside the visible light spectrum, which generally ranges from 400 to 700 nanometers.
The wavelength of light (400-700).
The wave frequency for 400 nanometers is approximately 750 terahertz (THz). This can be calculated using the formula: frequency = speed of light / wavelength.
Most humans eyes are sensitive to wavelengths between about 400 nanometers and 700 nanometers
Short answer: Very short More precise answer: 10 nanometers to 400 nanometers for one full wave (depending on how 'ultra' it is)
Yes, ultraviolet (UV) light has shorter wavelengths than visible light. UV light has wavelengths between 10 nanometers and 400 nanometers, while visible light has wavelengths between 400 nanometers and 700 nanometers.
1 x 1012 - 4.3 x 1014 Hz the frequency is 300 to 400 thz (tera hertz). the wave length is 1mm to .0008mm
The wavelength of the color violet is 450-400 nm, which can also be said as 450 to 400 nanometers.
An angstrom = 1 x 10-10 meters A nanometer = 1 x 10-9 meters you can see that a nanometer is ten times larger than an angstrom, so to convert angstroms into nanometers we must divide the angstrom value by 10. 7000/10 = 700nm
Answer - meters or derivations of meters e.g micrometers, nanometers etc