question: Light travels more quickly in air than what?
distractor3: metal
distractor1: earth
distractor2: glass
correct_answer: water
support: When light is refracted, it changes direction as it passes into a new medium and changes speed. The straw in the Figure below looks bent where light travels from water to air. Light travels more quickly in air than in water and changes direction. For a detailed explanation of how this happens, watch the animation at this URL:.