White light is incident on a prism from the left. After it passes through the first prism, a color spectrum of light is observed. The spectrum is then passed through a second prism which is inverted compared to the first prism. The color light that exit from the second prism
A) is also a color spectrum and more spread out.
B) is also a color spectrum but less spread out.
C) is white in color.
D) has more colors than the first spectrum.
E) has less colors than the first spectrum.

Question

White light is incident on a prism from the left. After it passes through the first prism, a color spectrum of light is observed. The spectrum is then passed through a second prism which is inverted compared to the first prism. The color light that exit from the second prism
A) is also a color spectrum and more spread out. 
B) is also a color spectrum but less spread out. 
C) is white in color. 
D) has more colors than the first spectrum. 
E) has less colors than the first spectrum.

Quizplus · Accepted Answer

When white light is incident on a prism, it gets dispersed into its constituent colors due to the phenomenon of refraction. The colors are arranged in a specific order due to their respective wavelengths. 
When this spectrum passes through a second prism in an inverted position compared to the first prism, the individual colors merge back to form white light. This happens because the second prism bends different colors at different angles, but in an opposite manner compared to the first prism. As a result, the colors are realigned to form white light. Hence, the answer is "C" - the light that exits from the second prism is white in color.

White Light Is Incident on a Prism from the Left