Laws of reflection
Introduction Reflection of light is a phenomenon in which light incident on an opaque surface is returned back into the same medium. formation of the image takes place due to the reflection of light. In this topic let us understand the rules followed by light during reflection,.
Reflection of light
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| Reflection of light |
Laws of reflection
1) Incidence ray, Reflected ray, and Normal lie on the same plane. (the same plane refers to the same axis )
2) Incident ray, reflected ray always lie on the opposite side of the Normal.
3) Angle of incidence is always equal to the angle of reflection. (i = r)the
Condition: If the incidence path angle is zero i.e light is incident straight perpendicular to the surface, then it traces the same path for reflection.
Facts: Interestingly, all the four laws stated
above can be derived from a single
principle called Fermat’s (pronounced
''Ferma'') principle. It says that “While
traveling from one point to another by one
or more reflections or refractions, a ray of
light always chooses the path of least
time”.
Ideally, it is the path of extreme time,
i.e., the path of minimum or maximum time.
We strongly recommend you to go through
a suitable reference book that will give
you the proof of i = r during reflection and
Snell’s law during refraction using
Fermat’s principle
(Source: Physics Textbook XI Msbshse)
Related Topics: Introduction to optics Laws of reflection Sign Convention Reflection from plane surface Spherical Mirror Image formed in Concave mirror Spherical Abberation Refraction Refractive Index Refraction from plane surface Lenses Refraction from Curved surface Lens makers Equation Dispersion Of Light Prism Formula
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