单词 | parabolic mirror |
释义 | parabolic mirror Revolve a parabola around its axis, and you have the shape of a parabolic mirror. Retrieved from Wikipedia CC BY-SA 3.0 It featured a small 12-volt bulb reflected by a large parabolic mirror. Retrieved from Wikipedia CC BY-SA 3.0 A fixed parabolic mirror creates a variously shaped image of the sun as it moves across the sky. Retrieved from Wikipedia CC BY-SA 3.0 In 1835, rapeseed oil replaced the coal and the lighthouse was fitted with a parabolic mirror. Retrieved from Wikipedia CC BY-SA 3.0 Using a parabolic mirror, he would hang contrasting pairs of painted shapes, which rotated freely. Retrieved from Wikipedia CC BY-SA 3.0 |
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