What does the sign omega look like?

The sign omega (Ω) is the 24th letter of the Greek alphabet. It resembles a horseshoe or a rounded "W," with the open part facing downwards. In its uppercase form, it has a circular shape with a slight dip at the bottom, while the lowercase version (ω) has a more rounded appearance with a tail extending downward. Omega is often used in mathematics and physics to represent various concepts, including angular velocity and ohms in electrical resistance.