Question

Long-AI
1. State and explain the laws of reflection​

Answer 1

Answer:

The Law of Reflection

The Role of Light to Sight

The Line of Sight

Law of Reflection

Specular vs. Diffuse Reflection

Light is known to behave in a very predictable manner. If a ray of light could be observed approaching and reflecting off of a flat mirror, then the behavior of the light as it reflects would follow a predictable law known as the law of reflection. The diagram below illustrates the law of reflection.

In the diagram, the ray of light approaching the mirror is known as the incident ray (labeled I in the diagram). The ray of light that leaves the mirror is known as the reflected ray (labeled R in the diagram). At the point of incidence where the ray strikes the mirror, a line can be drawn perpendicular to the surface of the mirror. This line is known as a normal line (labeled N in the diagram). The normal line divides the angle between the incident ray and the reflected ray into two equal angles. The angle between the incident ray and the normal is known as the angle of incidence. The angle between the reflected ray and the normal is known as the angle of reflection. (These two angles are labeled with the Greek letter "theta" accompanied by a subscript; read as "theta-i" for angle of incidence and "theta-r" for angle of reflection.) The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.

Answer 2

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The reflection of light on any surface obeys certain laws, which are known to be Laws of Reflection. Basically, there are two laws of Reflection.

- Angle of incidence = Angle of reflection

$\large{ \therefore{ \boxed{ \sf{ \angle \: i = \angle \: r}}}}$

- Incident ray, reflected ray and normal to the reflecting surface always lies on the same plane.

✏ Refer to the attachment...

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• A ray of light striking the surface normally retraced its path.

✒ It means, when a light ray fall perpendicular on the surface of mirror, it reverse its path on reflection. That is, exactly retraces its path because angle of incidence is equal to angle of reflection.

❇ Explanation:

When a ray of light strikes the surface normally, the angle of incidence is zero, with respect to normal. < i = 0°. According to the law of reflection, < r = < i, So, <r is also = 0° i.e. the reflected ray is also perpendicular to the surface. Thus, an incident that normal to the surface, retraced its path.

☄ The laws of reflection holds true for all kinds of mirror even, spherical or curved surface mirrors also.

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