Blue Tarantulas. In a way itâs a shame that most people think of the standard Chile Rose Haired and the Curly Haired spiders when they think of tarantulas because many people think that all tarantulas are a boring brown color. Of course this couldnât be further from the truth and if you know what species to look [â¦]
Answer: The black dot in your eye is called a pupil, it contracts and widens to regulate the amount of light entering the eye. It is really just a hole in the center of yo â¦ ur eye that allows light to pass through, that is really it. + 6 others found this useful. Sharon Robinson.
And a parabola has this amazing property: Any ray parallel to the axis of symmetry gets reflected off the surface straight to the focus. And that explains why that dot is called the focus ... ... because that's where all the rays get focused! So the parabola can be used for: 1  satellite dishes, 2  radar dishes, 3  concentrating the sun's rays to make a hot spot,