You are presented with the quiz "What is formed by refraction of light by separating light into all different wavelengths?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "arainbow is formed by refraction of light by separating light into all different colors" and "color is the same as wavelength ". 

So, what's the best answer to the question?


 

    a rainbow       