"5-3 Wave Interactions": HTML5 Crossword

Across

7. an image that is formed by the intersection of light rays; a real image can be projected on a screen (5,5)
9. the passage of an EM wave through a medium (13)
10. spreading out of light rays in all directions, because particles reflect and absorb the light (11)
11. an image that forms at a location from which light rays appear to come but do not actually come (8,5)
12. a change in the observed frequency of a wave due to relative motion between the source and the observer (8,6)
13. the spreading out of waves through an opening or around a corner (12)
14. meeting of waves in which the combined wave is larger than the original waves (13,12)
15. the bouncing back of a wave after it strikes a barrier (11)
16. the meeting and combining of waves (13)

Down

1. preventing the passage of light (7)
2. the disappearance of an EM wave into the medium (11)
3. allowing all or most of light to pass through easily (12)
4. a tool that uses refraction to spread out the different wavelengths that make up white light (6)
5. meeting of waves in which the combined wave is smaller than the original waves (12,12)
6. permitting some light to pass through but giving an unclear image (12)
8. a quality of light in which all of its waves vibrate in the same direction (13)
14. the bending of a wave as it enters a new medium (11)