how can we show that white light consists of 7 constituent colours?
why the white light passing through a rect. block does not show dispersion?
explain the reason why the white light shows the phenomenon of dispersion while passing through a prism?
24ans1 ) use prism
ans2 ) Dispersion occurs in glass slab too..but since the faces are parallel,=> the light emerges out in the direction that is same as that of incident radiation => no deviation
ans3 ) i think u would have got its answer by now [6]
62One more thing..
At a very fine level there are too many more than 7 colors.. (Like there are many many shades of each color!)
3in +2 u will learn abt dispersion,There are many of ways for dispersin of light.One of the interesting way to observe the spectrum is newton's rings method.u can get it in wikipedia