First of all its REFLECTION.... reflection is nothing but the bouncing back of light after striking a surface... if the surface is smooth then the angle of incidence will be equal to the angle of reflection.... if the surface is uneven then it is termed as diffused reflection..... 
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clear now??
ya, I got it thanks .........
hmmmm i have marked it...
A phenomena of returning the light from the surface of an object when light is incident on it it is known as reflection of light.