A piece of plane glass is placed on a word with letters of different colours. The letters which appear minimum raised are

Question

A piece of plane glass is placed on a word with letters of different colours. The letters which appear minimum raised are (A) red (B) green (C) yellow (D) violet

Tardigrade Admin · Accepted Answer

Refractive index (μ)=( text real depth / text apparent depth ) ⇒ μ α (1/ text apparent depth ) Since, violet light is refracted the maximum and red light are least, the refractive index is maximum for violet colour and minimum for red colour. Hence, letter which appears minimum raised are red.

Q. A piece of plane glass is placed on a word with letters of different colours. The letters which appear minimum raised are

red

green

yellow

violet

Refractive index (μ)= apparent depth real depth ​ ⇒μα apparent depth 1​ Since, violet light is refracted the maximum and red light are least, the refractive index is maximum for violet colour and minimum for red colour. Hence, letter which appears minimum raised are red.