a scientist is creating a device for humans to communicate through detectable light. which waves should the scientist apply from the electromagnetic spectrum.

To create a device for humans to communicate through detectable light, scientists should choose waves from the visible portion of the electromagnetic spectrum. The visible light spectrum ranges from approximately 400 to 700 nanometers (nm). This range includes different colors of light that can be seen by the human eye: violet, blue, green, yellow, orange, and red. Therefore, the scientist should apply waves in this range to enable communication through detectable light.