Question

What is the angle of incidence when the incident ray is normal to the interface or boundary separating two media?

• A. $0^o$
• B. ${90}^o$
• C. ${180}^o$
• D. ${45}^o$

Answer 1

Answer: (A)

$0^o$

If incident ray is normal to interface then

$i=0$ as the angle is measured with respect to the normal.

$i-$ angle of incidence