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Across 1. an instrument that uses a diffraction grating to visually observe spectra 5. a straight line drawn perpendicular to barrier struck by a wave 6. a natural or artificial means to achieve polarization 10. a wave that vibrates in all directions perpendicular to the diraction of travel 13. composed of only one colour; possessing only one wavelength 14. the ability of an instrument to separete two omages that are close together

Down 2. the property of a material that, when analyzed, reveals the material's stress distributions 3. radiation with frequencies higher than UV 4. the three-dimensional image formed as a result of interference of coherent light 7. if a wave meets the boundary at an angle, the direction of travel does change. 8. the change in direction of paricles or waves as a result of collisions with particles 9. radiation with frenquencies of UV and lower 11. a holograph is what you see when a hologarm is illuminated 12. confining the vibrations of a wave to one direction