Question

угол между падающим и отраженными лучами равен 90^,а угол между отраженными и преломленными лучами равен 120^, чему равен угол преломления?

Answer 1

По логике вещей 45... (180-90)/2

Answer 2

According to the law of reflection, the angle of incidence (the angle between the incident ray and the normal to the surface) is equal to the angle of reflection (the angle between the reflected ray and the normal to the surface). So if the angle between the incident and reflected rays is 90 degrees, it means the incident ray and the reflected ray are perpendicular to each other.

Now, when light passes from one medium to another, it refracts or bends. The relationship between the angles of incidence and refraction is described by Snell's law, which states:

n1 * sin(θ1) = n2 * sin(θ2)

Where: n1 is the refractive index of the first medium (incident medium). θ1 is the angle of incidence. n2 is the refractive index of the second medium (refracted medium). θ2 is the angle of refraction.

Since the angle between the reflected and refracted rays is given as 120 degrees, and we know that the incident and reflected rays are perpendicular (90 degrees between them), it implies that the angle between the incident and refracted rays is 90 degrees as well (the sum of the angles in a triangle is 180 degrees).

So, the angle of refraction (θ2) is 90 degrees.