All of us in our every day lives heard and see Telescope. How all these telescopes work ?
Telescope works on two basic principles of Optics (optics is the branch of physics which deals with the study of light and its interation with matter)
The two basic principles are Reflection and Refraction.
Reflection means redirection of light to another direction when it encounters two different media.
Go through the link to examine visually what is reflection
http://www.youtube.com/watch?v=T5oxC9l_u50
Refraction is bending of light rays when it passes from one media to another media.
Go through the link to examine visually what is refraction
http://www.youtube.com/watch?v=DtDaQPbKV9s&feature=BF&list=QL&index=1
We will discuss in detail regarding telescopes in next discussion
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