CONCAVE
CONVEX
FREQUENCY
INPHASE
LENSES
LONGITUDINAL
NORMAL
OUTOFPHASE
REFLECTION
REFRACTION
SUPERPOSITION
TOTALINTERNAL
TRANSVERSE
VELOCITY
WAVELENGTH
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Try to find all 15 words on this board.
| G | K | P | H | V | N | K | U | G | V | N | B | C | D | F |
| C | C | G | Y | E | O | Z | W | L | A | M | R | O | N | D |
| O | V | U | C | C | I | N | P | H | A | S | E | O | Z | T |
| N | M | N | N | K | T | L | R | N | Q | F | I | U | Y | O |
| V | L | C | E | P | C | Q | P | G | X | T | T | T | P | T |
| E | U | O | U | C | A | S | F | K | I | R | W | O | Y | A |
| X | E | N | Q | W | R | Y | G | S | E | A | L | F | T | L |
| T | S | C | E | M | F | D | O | F | V | N | D | P | I | I |
| F | N | A | R | P | E | P | L | E | D | S | X | H | C | N |
| O | F | V | F | V | R | E | L | I | S | V | Z | A | O | T |
| N | B | E | M | E | C | E | Y | O | B | E | F | S | L | E |
| M | C | B | P | T | N | Q | N | F | E | R | S | E | E | R |
| A | Y | U | I | G | X | S | R | K | E | S | R | N | V | N |
| M | S | O | T | Q | H | V | K | N | Z | E | M | Q | E | A |
| Q | N | H | L | A | N | I | D | U | T | I | G | N | O | L |
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