Chapter 14, Problem 7RAT

When a beam of light reflects from a pair of closely spaced surfaces, color is produced because some of the reflected light is

(a) converted to a different frequency.

(b) deflected.

(c) subtracted from the beam.

(d) amplified.

To determine

The correct option for the statement “When a beam of light reflects from a pair of closely spaced surfaces, color is produced because some of the reflected light is”.

Answer to Problem 7RAT

The correct option for the statement “When a beam of light reflects from a pair of closely spaced surfaces, color is produced because some of the reflected light is” is option (c).

Explanation of Solution

The phenomenon of forming a variety of colors due to the interference of reflected light from two surfaces is called iridescence. Light waves get reflected from both the surfaces of the film. This reflected ray reaches the observer. It travels along with various distances before reaching the observer.

When illuminated by white light, this film will be at the right thickness at one place that suits for any particular wavelength to cause destructive interference. When this color is subtracted from the white light, its complementary colors are seen. So whatever color is canceled by interference, the light saw is its complementary color.

Conclusion:

Therefore, correct option for the statement “When a beam of light reflects from a pair of closely spaced surfaces, color is produced because some of the reflected light is” is option (c).