Question

HELP PLEASE!!Refer to the image shown to answer the question. If a light ray strikes the shiny surface at 70 degrees, what is the measurement of the reflected ray?

Incident rays are shown at 10, 30, 50, and 70 degrees. The line at 90 degrees is labeled normal. Reflected rays are shown at 110, 130, 150 and 170 degrees.



110 degrees

10 degrees

170 degrees

70 degrees

Answer 1

110 degrees

Step-by-step explanation:

The incident ray is the ray of light that strikes the surface. This will form an angle with the perpendicular or normal (90 degrees) known as the angle of incidence.

This ray in turn will get reflected from the surface at an angle known as the angle of reflection. If the surface is non-scattering (specular) as it is here, then the angle of reflection and incidence are always identical.

Thus, in this example, the 70 degrees ray will have an incidence angle of 20 degrees (90-70=20). As a result, the reflected ray will also have a 20 degree angle which gives a 110 reflected ray (90+20= 110).