Megameter (Mm)
Definition: A megameter (Mm) is a unit of length equal to one million meters (10^6 meters). It is used to measure large distances in both geography and astronomy.
History: The megameter was introduced alongside other metric units to standardize measurements of large distances. It has been mainly used in astronomical contexts to simplify expressions of distances in space.
Current Use: Megameters are used in astronomy to describe distances between astronomical objects such as the Earth and the Sun. They also appear in some applications in geology and planetary science.
Nanometer (nm)
Definition: A nanometer (nm) is one-billionth of a meter. It is commonly used in nanotechnology, semiconductor design, and physics to measure atomic-scale structures and wavelengths of light.
History: The nanometer gained importance in the 20th century as scientists developed electron microscopes and advanced microfabrication techniques. It became critical for measuring molecules and tiny electronic components.
Current Use: Nanometers are used in physics, materials science, and chip manufacturing. They help define the scale of microprocessors, DNA strands, and wavelengths in ultraviolet and X-ray light applications.
Quick Conversion Table Megameter (Mm) to Nanometer (nm)
1 Megameter (Mm) equal to 1.0e+15 Nanometer (nm)
5 Megameter (Mm) equal to 5.0e+15 Nanometer (nm)
10 Megameter (Mm) equal to 1.0e+16 Nanometer (nm)
20 Megameter (Mm) equal to 2.0e+16 Nanometer (nm)
30 Megameter (Mm) equal to 3.0e+16 Nanometer (nm)
50 Megameter (Mm) equal to 5.0e+16 Nanometer (nm)
75 Megameter (Mm) equal to 7.50e+16 Nanometer (nm)
100 Megameter (Mm) equal to 1.0e+17 Nanometer (nm)