Question

A light ray enters from medium A to medium-B as shown in figure. The refractive index of medium B relative to A
will be
Medium B
Medium A
(A) Greater than unity
(Bless than unity
(C) Equal to unity
(D) zero​

Answer 1

Answer:

Greater than unity, is correct option of it

Answer 2

As the light enters from A to B medium, refractive index depends upon the medium travel.

• Let the refractive index from medium A is n1 and the refractive index of the medium B is n2.
• Noe the light enters from A to B, which means that light will move away from the normal.
• As the formula say n1 . sin(i)= n2 . sin(r)
• n1/n2=sin(r)/sin(i)
• Now it move away from the normal which means i>r
• That says sin(i)>sin(r)
• That can be written as 1>sin(r)/sin(i)
• That means option B is correct
• The refractive index less than one.
• When we reverse whole process by B to A , that will give refractive index greater than one.