Physics in Your World Archive
NASA-Apollo Missions - Sep 1, 2013
This historic photograph shows Earth, the moon, and NASA's Apollo 11 lunar module. The photo was taken from the command service module, which remained in orbit around the moon while the lunar module landed and then spent 21 hours on the moon's surface. During the Apollo 11 mission, astronauts set foot on the moon for the first time.
Wikipedia: Laser Lighting Display - Aug 1, 2013
Roentgen's Discovery of the x-ray - Jul 1, 2013
This photo is one of the first x-ray images, made by Wilhelm Roentgen in 1895. It shows the bones in his wife's hand. The calcium in her bones absorbed much of the energy from the x-ray beam and cast a shadow. Notice the shadow of her ring.
Astronomy Picture of the Day: Neutrinos in the Sun - Jun 1, 2013
This image of the sun was made with neutrinos, which are tiny, almost-massless particles that move at nearly the speed of light. Neutrinos are created in nuclear reactions, and were first detected near a nuclear reactor.
The bright white region near the center of the image shows the year-round Arctic ice in 2012. To see the startling decrease since 1980, visit NASA Finds Thickest Parts of Arctic Ice Cap Melting Faster and slide the white line in the middle of the image to the right.
Sun - Apr 1, 2013
You are looking at the sun, imaged in extreme ultraviolet light (invisible to us) and shown in false color. To learn more about the sun, visit this this National Geographic article, and also this Hyperphysics page.
Liquid Drop Art - Feb 1, 2013
This image was created by photographer Corrie White in her basement workshop. She uses a device a device that releases several drops from the same location in rapid succession, at predetermined time intervals. For more of her work, see Liquid Drop Art.
Atmospheric Optics: Aurora, Northern Lights - Jan 1, 2013
This image shows a view of the Aurora Borealis captured from the International Space Station as it flew over Nebraska. For more information, see NASA Image of the Day Gallery.
Astronomy Picture of the Day: To Fly Free in Space - Dec 1, 2012
This is astronaut Bruce McCandless, orbiting along with the Space Shuttle in 1984 as he tests his rocket pack. When he stepped outside to begin his spacewalk, why didn't he fall back to Earth? He stayed in orbit because before and after he stepped outside, McCandless and the Shuttle had the same velocity. The force of Earth's gravity bent his path into the same orbit as the shuttle; that's because the acceleration of gravity does not depend on the mass of the object being accelerated. To learn more about McCandless' spacewalk, see Astronomy Picture of the Day: To Fly Free in Space and Footloose.
How does an LCD display work? - Nov 1, 2012
Take a look at this video to see how a liquid crystal display (LCD) TV screen works. For more information, see this Case Western Reserve page.
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