A thin film appears magenta when illuminated with white light. The color being cancelled by destructive interference is
A)red.
B)green.
C)white.
D)blue.
E)none of the above

Question

Quizplus · Accepted Answer

Magenta is a combination of red and blue light. When white light (which contains all colors) illuminates the thin film, and magenta is observed, it means green light is being cancelled out by destructive interference, as white light minus green yields magenta.

A Thin Film Appears Magenta When Illuminated with White Light