The ______ of a ray refers to the angle formed between the reflected ray and the normal (an imaginary line perpendicular to the surface at the point of incidence).
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Correct answer: B
Explanation
The correct answer is option 2 i.e. Angle of Reflection.
The angle of reflection is defined as the angle formed between the reflected ray and the normal to the surface at the point where the light ray strikes. According to the Law of Reflection, the angle of reflection is always equal to the angle of incidence, which is the angle between the incoming (incident) ray and the normal.
This principle is true for both smooth and polished surfaces, like mirrors, where the reflected rays follow a predictable path. It’s a fundamental concept in optics and helps explain how mirrors form images, how periscopes work, and even how radar systems detect objects.
Other Options:
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Angle of Incidence – The angle between the incoming ray and the normal.
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Angle of Refraction – The angle between the refracted ray and the normal when light passes into a different medium.