which object reflects light with the longest wavelength?\no a yellow book\no a violet flower\no a blue…

Answer:

A. a yellow book

Brief Explanation:

In the visible - light spectrum, red has the longest wavelength, followed by orange and then yellow. Violet has a relatively short wavelength, blue is also shorter - wavelength compared to yellow, and green is in the middle of the visible - light spectrum in terms of wavelength. A yellow book reflects yellow light which has a relatively long wavelength among the given options.