Lenses - P3 AQA

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1) Refraction is the chnage of direction of light as it passes from one medium to another.

2) A lens forms an image by refracting light.

3) In a convex or converging lens, parallel rays of light are brought to a focus at the principal focus. The distance from the lense to the principle focus is called the focal length.

Refractive index= Sini/ Sinr

Where i is the angle of incidence and r is the angle of refraction



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