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2 articles trouvés pour ce sujet.
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Two mirrors |
2007-10-24 |
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Peter pose la question :
The reflecting surfaces of two intersecting flat mirrors are at an angle θ (0° < θ < 90°). For a light ray that strikes the horizontal mirror, show that the emerging ray will intersect the incident ray at an angle β = 180° – 2θ.
Stephen La Rocque lui répond. |
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A point that a group of lines pass through |
2000-12-05 |
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Ross pose la question :
A point that a group of lines pass through is called a________?
Chris Fisher lui répond. |
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