11. Light from a laser is expanded by a diverging lens ( not shown ), then is collimated into a parallel beam . 12. "It's not likely that all the parallel beams will hit the same turbulence, " which is usually quite local, Willebrand said. 13. The radio waves are emitted back toward the dish by the feed antenna and reflect off the dish into a parallel beam . 14. A parallel beam , with wave vector \ mathbf { k } _ i is incident on a square lattice of parameter a. 15. In other words, parallel beams of light travel in straight lines and never meet, just like parallel lines in high school geometry class. 16. A point source of monochromatic light is expanded by a diverging lens ( not shown ), then is collimated into a parallel beam . 17. It consists of a two-track composite construction with two parallel beams connected by diagonal steel girders and a deck made of a concrete slab. 18. "' Fig . 3 "': Considering a parallel beam irradiation optical system where the angle between the object and all transmission lights equals ?. 19. I want to convert the light from a single LED to a parallel beam so that it can travel further at a given intensity. 20. Hence, object ( 1 ) will not be moved while the parallel beam irradiation optical system are rotated around the object ( 1 ).
