What is the correct range for visible light in the electromagnetic spectrum?

What is the correct range for visible light in the electromagnetic spectrum?

• A. 100-400 nanometers
• B. 390-700 nanometers
• C. 700-1000 nanometers
• D. 800-1200 nanometers

Answer: (B)

Visible light is the portion of the electromagnetic spectrum that can be detected by the human eye. This range extends from approximately 390 nanometers, which corresponds to violet light, to about 700 nanometers, which corresponds to red light. This spectrum includes all the colors visible to humans, from violet, blue, green, yellow, and orange to red. Within this range, there are wavelengths that can trigger various responses in the eye, allowing us to perceive color. The other ranges provided do not accurately represent the visible spectrum. For instance, the range from 100-400 nanometers includes ultraviolet light, which is invisible to the human eye, while the ranges from 700-1000 nanometers and 800-1200 nanometers fall within the infrared spectrum, which is also not visible to us. Therefore, the range of 390-700 nanometers is the correct range for visible light in the electromagnetic spectrum.

Visible light is the portion of the electromagnetic spectrum that can be detected by the human eye. This range extends from approximately 390 nanometers, which corresponds to violet light, to about 700 nanometers, which corresponds to red light. This spectrum includes all the colors visible to humans, from violet, blue, green, yellow, and orange to red. Within this range, there are wavelengths that can trigger various responses in the eye, allowing us to perceive color.

The other ranges provided do not accurately represent the visible spectrum. For instance, the range from 100-400 nanometers includes ultraviolet light, which is invisible to the human eye, while the ranges from 700-1000 nanometers and 800-1200 nanometers fall within the infrared spectrum, which is also not visible to us. Therefore, the range of 390-700 nanometers is the correct range for visible light in the electromagnetic spectrum.