In general knowledge terms, what is the speed of light in vacuum approximately?

✅ A. Energy

The joule is the SI unit of energy and work. Read more

✅ C. Tesla

Magnetic flux density is measured in teslas. Read more

✅ A. Pascal

Pressure is measured in pascals. Read more

✅ A. Ammeter

An ammeter measures electric current. Read more

✅ D. 9.8 m/s²

Near Earth's surface, gravitational acceleration is approximately 9.8 m/s². Read more

✅ C. Reflection

Reflection is the return of light from a surface. Read more

✅ C. Newton's third law

Newton's third law describes action and reaction forces. Read more

✅ B. Convex lens

A convex lens is thicker at the center and converges parallel light rays. Read more