What is the largest wavelength of visible light?

• A. Yellow light
• B. Red light
• C. Blue light
• D. Green light

Answer: (B)

The largest wavelength of visible light corresponds to red light, which typically ranges from about 620 to 750 nanometers. In the visible spectrum, light is made up of various colors, each associated with a specific wavelength. Red light has the longest wavelength among these colors, which is why it is often seen at the end of the visible spectrum.

In terms of its properties, the longer wavelength of red light means it carries less energy compared to shorter wavelengths like blue or green light. This fundamental characteristic is critical in various applications, including photography and optics, where different wavelengths can be harnessed for specific effects. The understanding of wavelengths across the spectrum is essential in fields such as physics, art, and photography, where color and light play vital roles.