Physics 2000 JAMB Past Questions - Question 29: In the diagram above, a beam of white light travels from a rare to a dense medium. What colours of light do the rays a, b, and c respectively represent?

Correct Answer

C

Explanation

In the diagram, when a beam of white light travels from a rare medium to a dense medium, the phenomenon of refraction occurs. This causes the different colors of light to bend at different angles.

Typically, white light consists of a combination of different colors, such as red, orange, yellow, green, blue, indigo, and violet. Each color has a different wavelength and frequency.

When white light enters a dense medium, like a glass prism, it undergoes dispersion, which means that the different colors separate due to their varying wavelengths. The colors with longer wavelengths, such as red, are refracted less than those with shorter wavelengths, such as violet.

Based on this information, the rays a, b, and c in the diagram would represent different colors of light after passing through the prism. However, without further information or a specific diagram, I cannot determine the exact colors represented by rays a, b, and c.