Which unit is used in ultraviolet wavelength values such as 2600-2700 A?

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Multiple Choice

Which unit is used in ultraviolet wavelength values such as 2600-2700 A?

Explanation:
Wavelengths in the ultraviolet are often given in Angstroms, because the numbers are more convenient at these tiny scales. An Angstrom is 1e-10 meters, or 0.1 nanometers. So 2600–2700 Å equals 260–270 nm, which falls squarely in the UV range. The notation with A signals Angstroms, even though the same values could be written as 260–270 nm in nanometers. The other units would not match this common UV notation or would correspond to much larger scales (micrometers or meters).

Wavelengths in the ultraviolet are often given in Angstroms, because the numbers are more convenient at these tiny scales. An Angstrom is 1e-10 meters, or 0.1 nanometers. So 2600–2700 Å equals 260–270 nm, which falls squarely in the UV range. The notation with A signals Angstroms, even though the same values could be written as 260–270 nm in nanometers. The other units would not match this common UV notation or would correspond to much larger scales (micrometers or meters).

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