Question

what will happen if two glass prisms are placed in same order?

it is alredy given in NCERT that what will happen if 2 glass prisms are placed in diff order i dont wnt to know this

Answer 1

Answer:

You will see that only a beam of white light comes out from the second prism because white light comprises of seven component colours but if a prism is placed upside down behind a prism that is scattering light such that they are touching each other, then dispersion will not take place and we won't see the seven color ...

Explanation:

This is because the two prism configuration acts like a rectangular slab now, the incoming light would be refracted and laterally displaced.