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Light, reflection and refraction - Coggle Diagram
Light, reflection and refraction
Definitions
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Reflection of light
Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
Refraction of light
Refraction of light is the phenomenon of change in the path of light in going from one medium to another.
In going from a rarer to a denser medium, the ray of light bends towards normal and in going from a denser to a rarer medium, the ray of light bends away from normal.
Reflection of light
Laws of reflection
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the incident ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane.
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Neumerical Formulea
Absolute refractive index(n) of a medium is the ratio of speed of light in vacuum or air(c) to the speed of light in the medium(v)
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Spherical Mirrors
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Concave Mirror
m is +ve when image formed is virtual and m is –ve, when image formed is real.
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According to New Cartesian Sign Convention, for spherical mirror.
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(ii) The distances measured in the direction of incidence of light are taken as positive and vice–versa.
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In spherical mirror, focal length
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