Which food is incorrectly stored in a walk-in refrigerator? 1. raw ground beef stored on a shelf above a tray of bologna. 2. egg salad stored in a plastic container with a tight-fitting lid on the top shelf. 3. loosely covered, pre-cooked chicken noodle soup cooling on the top shelf. 4. frozen turkey thawing in a pan on the bottom shelf?

reflection is the bouncing back of a propagating wave when it encounters a barrier; usually shows an image of the source of light wave

1) bounces back from an opaque material

2) bounces back from the boundary

3) seen in mirrors

refraction is the bending of a propagating wave having a shift of direction as it passes through different media; usually seen in lenses to magnify or lessen

1) passes through a prism

2) moves from one medium to another

3) seen in lenses