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I want the basics of Reflection to be clarified before I begin Refraction. Pl help.

Bouncing back of light from any polished surface is known as reflection of light.
When light falls on a surface, the direction of the ray is changed. This change in direction is known as reflection of light. The reflected light travels to the same medium it came from.
At the point of reflection, angle of incidence and angle of reflection are always equal. This is known as law of reflection.
 Looking mirror is an example of reflection. We see our image due to reflection of light through mirror surface and reach our eyes.

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The following defination can help you .Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. The law of reflection says that for specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected. Mirrors exhibit specular reflection.

In acoustics, reflection causes echoes and is used in sonar. In geology, it is important in the study of seismic waves. Reflection is observed with surface waves in bodies of water. Reflection is observed with many types of electromagnetic wave, besides visible light. Reflection of VHF and higher frequencies is important for radio transmission and for radar. Even hard X-rays and gamma rays can be reflected at shallow angles with special "grazing" mirrors.

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refraction is that when light coming from one medium (source) is absorbed by another medium and is not reflected back. When the light from rarer medium (ie is having less density ex- air) enters into the denser medium( ie having more density ex water) the light ray bend towards the normal and the objaect seems to be nearer than its actual position!!

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