Question

a red opaque object
a) reflects all colors
of the visible
spectrum but red.
b) reflects red light
only.
c) absorbs all colors
of the visible
spectrum equally.
d) absorbs red light

Explanation:

To determine the correct option, we use the concept of how opaque objects interact with light: opaque objects reflect the color we perceive and absorb other colors. A red opaque object appears red because it reflects red light (the wavelength corresponding to red) and absorbs other visible light wavelengths.

• Option A is incorrect because reflecting all colors except red would make the object appear as the complement of red (e.g., cyan), not red.
• Option C is incorrect because absorbing all colors equally would make the object appear black (or gray if there's some reflection), not red.
• Option D is incorrect because absorbing red light would mean the object does not reflect red, so it would not appear red.
• Option B is correct as a red opaque object reflects red light (the light that reaches our eyes, making it look red) and absorbs other colors.

Answer:

B) reflects red light only.