the visible light portion of the electromagnetic spectrum has wavelengths ranging from about 400 to 700 nanometers (nm). which of the following statements is true? the visible light portion of the electromagnetic spectrum has wavelengths ranging from about 400 to 700 nanometers (nm). which of the following statements is true? blue light has wavelength of about 700 nm, red light has wavelength of about 400 nm. blue light and red light both have wavelengths of about 550 nm. blue light and red light can both have wavelengths that may be anywhere between 400 and 700 nm. blue light has wavelength of about 400 nm, red light has wavelength of about 700 nm.