Physics: Principles and ProblemsChapter 18:
Refraction and LensesProblem of the Week (1.0K) | (0.0K) | (0.0K) | The
requirements for the sketch are:
- for
reflection, angle in equals angle out
- for
refraction, bend away from center
| | (3.0K) Path
of the sound wave. | | (39.0K) Model
of reflecting and refracting sound waves in the sun. | | (0.0K) | The
daylight is extended because of refraction, not only on the
equinox, but on all days. As light passes through our atmosphere,
it will slow down and consequently it will bend. On the horizon,
light must pass though a large portion of air, causing any celestial
body to appear about half a degree higher on the horizon than
it actually is. So at sunrise, we see the entire image of the
sun before it physically is above our horizon. | | (7.0K) Exaggerated
diagram of atmospheric refraction | | Mercury
has no atmosphere. If Earth had no atmosphere, then there would
be no refraction. Without refraction, the day and night would
be equal length on the equinox. If one wanted to be picky, one
could celebrate the equality of day and night on March 15th,
the true day of equal night and light. | | (0.0K) | (0.0K) | (0.0K) | (0.0K) | (0.0K) |
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