Angle 2 is the angle of reflection. the light incident will bounce to the opposite end after striking is called the reflection.
What is the law of reflection?
The law of reflection specifies that upon reflection from a downy surface, the slope of the reflected ray is similar to the slope of the incident ray.
The reflected ray is consistently in the plane determined by the incident ray and perpendicular to the surface at the point of reference of the incident ray.
When the light rays descend on the smooth surface, the angle of reflection is similar to the angle of incidence, also the incident ray, the reflected ray, and the normal to the surface all lie in a similar plane.
In the reflection, the light incident will bounce to the opposite end after striking. Angle 2 satisfies the properties of the reflection.
Hence angle 2 is the angle of reflection.
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