What are the laws of light reflection ?

Laws of light reflection

The distance between the Earth and the Moon can be measured by the reflection of a laser beam directed from the Earth towards a reflection surface placed on the Moon surface .

The  reflection of light is governed by two laws , the first law of light reflection is the angle of incidence which makes with the normal equals the angle of reflection  that makes with the normal , The reflected ray and the incident ray are on the opposite sides of the normal .

The incident light ray , the reflected light ray and the normal to the surface of reflection at the point of incidence , all lie in one plane perpendicular to the reflecting surface .

Reflection of light

Reflection of light

The incident light ray is a narrow light beam which is represented by a straight line , it intersects with the reflecting surface at the point of incidence .

The reflected light ray is a narrow light beam which is represented by a straight line that is reflected from the reflected surface at the point of incidence .

The angle of incidence is the angle between the incident light ray and the line perpendicular to the reflecting surface at the point of incidence .

The angle of reflection is the angle between the reflected light ray and line perpendicular to the reflecting surface at the point of incidence .

The incident light ray which falls perpendicular on a reflecting surface , reflects on itself , because the angle of incidence and the angle of reflection equals zero .

If the reflecting surface is very smooth , the reflection of light that occurs is called specular or regular reflection , when the light ray strikes a plane mirror , the light ray will reflect  off the mirror , and the reflection of light involves a change in the direction of the light ray .

The objects can be seen by the light they emit , the objects do not produce their own light , the light strikes the object and reflect from the objects into our eyes , so , we can see the objects .

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