state of law of reflection of light. write down an expression to relate the refractive index of a medium with the respect to the speed of light in vacuum. the refractive index of water with respect to air is 4/3. the speed of light in water is 2*10 power 8 m/s. find the speed of light in air.
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Laws of reflection:
A) The incident ray, the reflected ray, and the normal to the reflecting surface at the point of incidence, all lie on the same plane which is perpendicular o the reflecting surface.
B) The angle of incidence is equal to the angle of reflection.
A) The incident ray, the reflected ray, and the normal to the reflecting surface at the point of incidence, all lie on the same plane which is perpendicular o the reflecting surface.
B) The angle of incidence is equal to the angle of reflection.
harsha200314101:
Speed of light is 3 into 10 to the power 8 m/s
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•The ratio of sine of angle of incidence to the sine of angle of refraction always remains a constant.
This constant is called Refractive Index.
This law is called Snell's law.
Sin i/Sin r = a constant.
• In a denser medium, the speed of light is less and it bends towards the normal.
• In a rarer medium, the speed of light is more and it bends away from the normal.
•Refractive Index of a medium = Speed of light in vacuum/ Speed of light in the medium
This constant is called Refractive Index.
This law is called Snell's law.
Sin i/Sin r = a constant.
• In a denser medium, the speed of light is less and it bends towards the normal.
• In a rarer medium, the speed of light is more and it bends away from the normal.
•Refractive Index of a medium = Speed of light in vacuum/ Speed of light in the medium
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