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Date: 1-8-2020
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Date: 5-8-2020
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Date: 3-3-2016
1987
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The telescope: Magnifying power
Direct the telescope to the day sky and place a thin piece of paper over the eyepiece. Measure the diameter of the exit pupil, d, for a range of values of the entrance aperture, D. From a plot of d against D, determine the gradient. The magnifying power is defined by the ratio D/d and, hence, the measured gradient provides a value for the magnifying power of the telescope and eyepiece combination.
Change the eyepiece for one with a different focal length and repeat the experiment.
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دراسة يابانية لتقليل مخاطر أمراض المواليد منخفضي الوزن
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اكتشاف أكبر مرجان في العالم قبالة سواحل جزر سليمان
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المجمع العلمي ينظّم ندوة حوارية حول مفهوم العولمة الرقمية في بابل
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