Megameter
A megameter (Mm) is a unit of length in the metric system, equal to 1 million meters (1 Mm = 10⁶ meters or 1,000 kilometers). Megameters are used to measure very large distances, typically on a global or planetary scale. For example, the Earth’s diameter is about 12.7 megameters. Although it’s a valid metric unit, the megameter is rarely used in everyday life or science, as kilometers or other astronomical units are more common for such distances.
Ångström
An ångström (symbol: Å) is a unit of length commonly used in physics, chemistry, and biology to measure very small distances, such as atomic and molecular scales. It is equal to 10⁻¹⁰ meters, or 0.1 nanometers (nm).
The unit is named after the Swedish physicist Anders Jonas Ångström, who made significant contributions to spectroscopy.
Key facts:
1 ångström = 10⁻¹⁰ meters = 0.1 nanometers
Used to measure atomic and molecular sizes, wavelengths of light, and crystal lattice constants
Common in fields like crystallography, chemistry, and materials science
Though largely replaced by the nanometer in the SI system, the ångström remains widely used in scientific literature to describe very small lengths.
No conversions available for length.