I)state the laws of refraction of light with two examples for refraction of light in daily life. ii)aconvex lens of focal length is 10cm , calculate its power?
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i) Laws of Refraction of Light
1... The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane.
2... The ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for the light of a given colour and for the given pair of media. This law is also known as Snell's Law of refraction.
ii) Power of convex lens= 1/Focal length of given lens(in metres)
Focal length of the lens=10cm or 0.1m
Therefore, Power of the lens=1/0.1 D
=>+10D
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