Answer:
Hi there! The answer is below.
Explanation:
Theories may be revised over time as new facts or technology become available. Changes in experimental procedures are a result of new developments, which offer data that may or may not support the existing theory. It's possible that the theory will be modified if it's still valid. The theory may be replaced if it is not supported but the results are true and important.
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Snell's law is defined as the ratio of the sine of angle of incidence to the sine of the angle of refraction which is constant for a given pair of media and it is also known also as refractive index of the medium.
Answer:
1. keep your vehicle close to others.
