multiple - choice question which color has the highest energy? green red violet

Brief Explanations:

In the visible - light spectrum, energy is inversely proportional to wavelength. Violet has the shortest wavelength among green, red, and violet. Shorter wavelength means higher frequency and higher energy according to the formula $E = h\nu$ (where $E$ is energy, $h$ is Planck's constant, and $\nu$ is frequency).

Answer:

C. violet