Question

The angle between the incident and the emergent ray from a glass slab is

• A. ${90}^{\circ }$
• B. $0^{\circ }$
• C. Less than ${90}^{\circ }$
• D. More than ${90}^{\circ }$

Answer 1

The correct option is B $0^{\circ }$

The light ray will travel along the interface without entering the glass prism so the incident ray and emergent ray will be straight and hence angle between incident ray and emergent ray will be 0 degree.