21. Transparency depends upon the linearity of the passage of light rays through the material. 22. Now we look at light rays that are directed outward, along these normal vectors. 23. Even in the drizzle, the mast of the solar tent registered a few light rays . 24. It possesses a light ray system that extends for a distance of over 400 kilometers. 25. A custom-tailoring service uses light rays rather than a measuring tape to size up customers. 26. The same laws of reflection and refraction hold for sound rays as for light rays . 27. These behaved similarly to visible violet light rays , but were beyond them in the spectrum. 28. His analyses of reflection and refraction considered the vertical and horizontal components of light rays separately. 29. A laser light source provides a light ray . 30. This conic section is the intersection of the cone of light rays with the flat surface.
