Final answer:
Light travels at the speed of light (c), which is approximately 3.00 × 10⁸ m/s in a vacuum. Therefore, the correct answer is a) 3 × 10⁸ m/s.
Step-by-step explanation:
The speed at which light travels in a vacuum is a fundamental constant known as the speed of light, and it is denoted by the symbol c. The value of c is approximately 3.00 × 10⁸ meters per second (m/s), which is a well-known constant in physics.
Given this, the answer to the question about light's speed in meters per second is a) 3 × 10⁸ m/s. This is the standard speed of light in a vacuum, which could be slightly lower in different mediums due to the refractive index, as light travels slower in matter than in a vacuum.