Why does the back of a cd give a colourful reflection? full explanation please?

Question

ON the back of a cd (the shiny part) it is all colourful and i wanted to know why and i wonderign if i coudl get a full explanation please.

Answer 1

okay dokey here we go...

Weh na c.d. is made they put the blank c.d. o \n a machine that makes little cuts and divots in the c.d.  With these cuts iit stores informtion.  The information stuff is delecate so they coat it with a strange substance (i do not know what it is) which reflects light.  And when it reflects in makes colorful peices of light.

Answer 2

well just in case you don't know normal light that we see is made up of many different colors (red,green,blue, etc.) and the back of the cd is made of some special material so when light hits the back of the cd, that glass or whatever the cd is made of separates the light back to its seperate colors

Answer 3

its "colorful" not colourful

Answer 4

The back of a CD is covered in closely-spaced circles - grooves and bumps.  It acts like a diffraction grating - what they put in prism glasses and spectrascopes - to break up the light into it's components, like a prism does.