What is the range of wavelengths for the visible light spectrum?

• A. 300 nm to 600 nm
• B. 400 nm to 700 nm
• C. 500 nm to 800 nm
• D. 200 nm to 300 nm

Answer: (B)

The visible light spectrum encompasses wavelengths that range approximately from 400 nm to 700 nm. This segment of the electromagnetic spectrum is what the human eye can perceive and includes all the colors of light that can be seen, from violet at the lower end (around 400 nm) to red at the upper end (around 700 nm).

This range supports the understanding of how different wavelengths correspond to different colors: shorter wavelengths represent the blue and violet hues, while longer wavelengths correspond to yellow, orange, and red hues. Knowing this spectrum is essential for various applications in physics, biology, and optics, as it influences how organisms perceive their environment and how technologies like cameras and displays are designed to replicate the colors of visible light.

The other ranges provided do not fall within the boundaries recognized for visible light, focusing instead on ultraviolet or infrared wavelengths, which are outside human visible perception.