Question

light : reflection and refraction​

Answer 1

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Reflection and refraction. Light rays change direction when they reflect off a surface, move from one transparent medium into another, or travel through a medium whose composition is continuously changing. ... The reflected ray is always in the plane defined by the incident ray and the normal to the surface.

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Answer 2

REFLECTION OF LIGHT MEANS BOUNCING BACK OF LIGHT AFTER TOUCHING OTHER SURFACE'S BOUNDARY. IT FOLLOWS LAWS OF REFLECTION.

REFRACTION MEANS LATERAL DISPLACEMENT OF LIGHT RAY FALLING FROM ONE SURFACE TO OTHER. IT FOLLOWS SNELL'S LAW.