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The surface of the parabola reflected sound waves to a dynamic microphone at its focal point. Focusing the sound waves in this way dramatically increased the input to the recording equipment and concentrated it to at least twenty decibels louder than the sounds not caught by its narrow shape, ...
The fact that you never get "good as it gets" with your collimating tools would seem to indicate that your primary mirror center marker is off-center, or, if it's not, your parabola is off-center. That said, I see no mention of a Cheshire, collimation cap, or Barlowed laser in you...
Suddenly I noticed a hex nut on a piece of equipment. The lightbulb went off. I slapped my forehead and said Duh! Hex nuts are hexagons. They come in an amazing variety of sizes. They are easy to find and relatively cheap. I went online and found a table showing the dimensions of ...
Using the Correct Formula to Find the Focus of a Parabola If you’ve ever cooked food with a parabolic oven in science class or seen the Death Star’s laser in ''Star Wars'', you have an idea of what the focal point (or focus) of a parabola is. But how do you calculate the fo...