The book Elements of Natural Philosophy was written by author Ernst Gottfried Fischer Here you can read free online of Elements of Natural Philosophy book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Elements of Natural Philosophy a good or bad book?
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) If the flame is between the focus and the mirror, we see a vertical magnified image of it, which appears to be a little further behind the mirror, than the flame is before it. As we bring the light towards the focus, the image increases in magnitude and dis- tance. (2. ) If we place it at the focus, the image disappears, and we see only the luminous reflection described in the preceding article, which consists almost entirely of parallel rays. (3. ) If we place the light beyond the focus, we ...no longer per- ceive its image in the mirror ; but when it is at a certain distance, a large inverted image is painted on a white screen or wall opposite the mirror ; if we remove the light still further, this image is brought nearer and becomes smaller. When the distance of the flame be- comes double the focal distance, the image and object coincide, since in this case, the flame is at the centre of curvature of the mirror. If we remove it still further, the image now smaller than flie flame, approaches the focus, and at length, when the light is removed to an .
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