Question

several students are trying to determine which material would be best to use to cover the outside of the classroom windows so the sun does not heat up the room. they shine a beam of light at different materials and they record the path of the light for each material. which diagram shows the material they should use on the classroom windows?

Explanation:

To prevent the sun from heating the room, the window material should reflect light (so light doesn't pass through to heat the room) or absorb it. Diagram B shows light being reflected (the incoming light bounces off the material), while A shows refraction (light passing through with direction change), C is a weak refraction, and D is scattering. Reflecting light (like in B) would send the sun's light back outside, reducing heat entry.

Answer:

B. The diagram where light is reflected off the material (showing the incoming light bouncing back)