Question

a plane glass slab is kept over various coloured letters, the letter which appears least raised when observed normally from outside slab is what colour?

red is the ans.....but red has more wave lenght and i will travel fast so it wil be raised more but they say red is raised less why? and how?

Answer 1

Violet has a low wavelength.

So it is a red color that reflects first from the plane mirror.

Red color has the longest range and can go through all sorts of refractive indexes and layers and travels faster than any other color because of the longest wavelength.