Which color of light has the lowest energy?

• A. Yellow
• B. Green
• C. Red
• D. Violet

Answer: (C)

The color of light that has the lowest energy is red. Light is part of the electromagnetic spectrum, and the energy of a photon is inversely related to its wavelength. This means that the longer the wavelength, the lower the energy of the light.

Red light has a longer wavelength than yellow, green, and violet light. Specifically, red light typically has wavelengths of about 620 to 750 nanometers. In comparison, violet light, which has the shortest wavelength among the options given, ranges from approximately 380 to 450 nanometers and carries the most energy.

Since energy is inversely related to wavelength, red light, having the longest wavelength, therefore possesses the least energy compared to the other colors listed. This relationship is an essential part of understanding the properties of light and how different wavelengths correspond to different colors within the visible spectrum.