Choose the word or phrase that best completes each sentence. Al-Idrisi sent explorers to
so he could understand the world.
Aldrisi wrote a book to describe the world's
ibn Batutah traveled to Africa, Europe, and
Ibn Battutah's book describes the
of places he visited

the correct answer is blue and green.

a visible spectrum is electromagnetic spectrum color that can be seen by a normal human being by a single wavelength of light. the visible light spectrum is the range of wavelengths that make up visible light. the visible light spectrum passes through a prism enabling the rainbow reveals all the colors in the spectrum. these range from red, orange, yellow, green, blue and violet.