A unit of distance measurement that equals 10-9 meters neutrino - Mysterious and poorly understood sub-atomic particles that have no charge and little, if any, mass neutron - An uncharged, subatomic particle of approximately the same mass as the proton
A distance of one billionth of a meter The nanometer, or nm, is a common unit used to describe wavelengths of light or other electromagnetic radiation such as UV For example, green light has wavelengths of about 500-550 nm, while violet light has wavelengths of about 400-450 nm One billionth is a tiny number; 48 round-trips between Los Angeles and Washington, DC is roughly one billion feet
A unit of length in the International System of Units (SI) equal to one billionth of a meter (10-9 meter) Once called a millimicron, it is used to represent wavelength Abbreviated nm
(nm)a standard unit of distance used in measuring wavelengths in the electromagnetic spectrum (equal to 10-9 meter or 10 angstroms); one billionth of a meter