光的折射定律的英文表述为 "Law of Refraction"。
光的折射定律英文例题：
Example: Consider a ray of light traveling from a medium of refractive index n1 into a medium of refractive index n2. Let θ be the angle between the initial direction of the ray and the normal to the interface between the two media.
Then, the law of refraction states that the angle of incidence is equal to the angle of refraction, or θi = θr. This can be written in terms of angles in the two media as:
θi = θr = arcsin(n2 sinθ1) / n1
In this equation, θi is the angle of incidence in the second medium, θr is the angle of refraction in the second medium, and n1 and n2 are the refractive indices of the two media.
Note that this equation assumes that the ray is incident on the interface at a normal angle, i.e., θi = 90°. If the ray strikes at an angle other than normal, then there will be a change in the angle of refraction as well, known as the refraction angle.
Explanation:
In this example, we are considering a ray of light traveling from air (n1 = 1) into water (n2 = 1.33). Let's say that the ray strikes the interface at an angle of 30°. Using the law of refraction, we can calculate the angle of refraction in water.
θr = arcsin(n2 sinθi) / n1 = arcsin(1.33 sin 30°) / 1 = 26.5°
This means that the ray will be refracted by approximately 26.5° in the water. Note that this is different from the incident angle of 30° because the ray undergoes a change in direction due to refraction.
