Question

Suppose you calculated the speed of light in an unknown substance to be 4.00 x 10^8 m/s. How could you tell you made an error in your calculations.

Answer 1

The speed of light in a vacuum is 3.0 × 10⁸ m/s.
When light travels through a medium, the speed of light decreases.

Answer 2

When light travels through a medium, the speed of light decreases.

What is the speed of light?

The speed of light is how fast a light ray travels through a medium. The speed of light in a vacuum is 3.0 × 10⁸ m/s.

This is the maximum speed of light. But when a light moves through another medium, the speed decreases , not increases.

Thus, the speed calculated is incorrect.

Learn more about speed of light.

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