Question

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?
○ 170 degrees
○ 110 degrees
○ 70 degrees
○ 10 degrees

Explanation:

Step1: Recall Law of Reflection

The law of reflection states that the angle of incidence (measured relative to the normal) equals the angle of reflection. If the ray strikes the surface at 70° (angle with the surface), first find the angle with the normal:
$\text{Angle of incidence} = 90^\circ - 70^\circ = 20^\circ$

Step2: Calculate reflected angle to surface

The angle of reflection (with the normal) is also $20^\circ$. Convert this to the angle between the reflected ray and the surface:
$\text{Angle with surface} = 90^\circ - 20^\circ = 70^\circ$
Note: If the question refers to the angle of reflection relative to the normal, but the options confirm it asks for the angle relative to the surface, which matches the incident angle to the surface.

Answer:

70 degrees