Final answer:
The true statement about the speed of light is that it is faster in a vacuum than in glass, as light slows down in any medium compared to its speed in a vacuum.
Step-by-step explanation:
The question is about the speed of light in different media. When discussing the properties of light, one key fact is that the speed of light is maximum in a vacuum. Based on the given information and physics principles, the correct statement about the speed of light is that it is faster in a vacuum than in other media such as air, water, or glass. To provide a clear understanding, the speed of light in a vacuum is approximately 3.00 × 108 m/s, and when light enters a medium like glass or water, it slows down due to the medium's refractive index.
Therefore, answering the original question: The statement that is true about the speed of light is d) It is faster in a vacuum than in glass. This is because light slows down when it travels through any medium, including glass, water, or air, compared to its speed in a vacuum.