Jupiter Eclipsing Ganymede - Astronomy Picture of the Day - 2009 January 6. Properties of Light. Our eyes interpret these wavelengths as different colors. If only a single wavelength or limited range of wavelengths are present and enter our eyes, they are interpreted as a certain color. If a single wavelength is present we say that we have monochromatic light. If all wavelengths of visible light are present, our eyes interpret this as white light. If no wavelengths in the visible range are present, we interpret this as dark. Interaction of Light with Matter Velocity of Light and Refractive Index The energy of light is related to its frequency and velocity as follows: The velocity of light, C, in a vacuum is 2.99793 x 1010cm/sec. The frequency of vibration, n, remains constant when the light passes through a substance. We here define refractive index, n, of a material or substance as the ratio of the speed of light in a vacuum, C, to the speed of light in a material through which it passes, Cm.
Air, since it is a gas, is isotropic. Partial solar eclipse and transit of the Space Station from Oman. Image of the solar transit of the International Space Station (ISS), taken from the area of Muscat in the Sultanate of Oman on January 4th 2011 at 9:09 UT, during the partial solar eclipse. Takahashi FSQ-106ED refractor on EM-10 mount, Canon 5D mark II. 1/5000s exposure at 100 iso.
Transit forecast calculated by www.calsky.com (many thanks to Arnold Barmettler for his help). Transit duration: 0.86s. ISS distance to observer: 510 km. Speed in orbit: 7.8km/s (28000 km/h or 17000 mph). The image shows three planes in space: the Sun at 150 million km, the Moon at about 400000 km and the ISS at 500 km. (click on the image for a larger version) Home page. INSANELY awesome solar eclipse picture. Earlier today Europe, Asia, and Africa got to see a nice partial solar eclipse as the Moon passed in front of the Sun, blocking as much as 85% of the solar surface. The extraordinarily talented astrophotographer Thierry Legault traveled from his native France to the Sultanate of Oman to take pictures of the eclipse. Why there, of all places? Heh heh heh. It’ll be more clear when you see this ridiculously awesome picture he took: Holy solar transits! Can you see why he traveled so far to get this shot? That’s why Thierry sojourned to Oman; due to the geometry of the ISS orbit, it was from there that he had the best chance of getting a picture of the station as it passed in front of the Sun during the relatively brief duration of the actual solar eclipse.
To give you an overall idea of what you’re seeing here: the Sun is 147 million kilometers away (less than usual because this eclipse happened, coincidentally, very close to perihelion, when Earth was closest to the Sun). Related posts: When natural and artificial moons align. Earth_jupiter.jpg (JPEG Image, 1444x4266 pixels) - Scaled (22%) Celestia: Home. Stellarium. The Physics of Light: Diffraction. As of July 1, 2013 ThinkQuest has been discontinued. We would like to thank everyone for being a part of the ThinkQuest global community: Students - For your limitless creativity and innovation, which inspires us all. Teachers - For your passion in guiding students on their quest. Partners - For your unwavering support and evangelism. Parents - For supporting the use of technology not only as an instrument of learning, but as a means of creating knowledge.
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Astronomy Picture of the Day. Nasa APOD 2010. SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids. SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids.