The line that appears to be formed at the boundary between two different refractive indices and disappears if two substances has the same refractive index is called the ____________ line.

Question

Quizplus · Accepted Answer

The line described in the question is known as the Becke line, named after German physicist Ernst Karl Abbe's student, Richard Becke. The Becke line occurs when light travels from a medium with a higher refractive index to a medium with a lower refractive index. As the focus is adjusted, a line appears at the boundary between the two substances, indicating where the light is refracted. If the two substances have the same refractive index, the Becke line disappears.

The Line That Appears to Be Formed at the Boundary