Newtons Opticks with colour Spectrum
Opticks by the English physicist and mathematician Sir Isaac Newton (1642-1727), published in 1704 with a colour spectrum produced by a prism projected across the title page. This work was based on Newton's own experimental investigations into the behaviour of light. In Opticks he discussed topics such as the refraction of light by prisms and the rings of coloured light formed between a lens and a mirror in contact with each other (later termed Newton's rings). In Isaac Newton's time, it was believed that white light was colourless, and that the prism itself produced the colour. Newton's experiments convinced him that all the colours already existed in the light in a heterogeneous fashion, and that "corpuscles" (particles) of light were fanned out because particles with different colours travelled with different speeds through the prism
© DAVID PARKER/SCIENCE PHOTO LIBRARY
ITER fusion research reactor
ITER fusion research reactor, computer artwork. ITER, the International Thermonuclear Experimental Reactor, is being designed to test the principles surrounding the generation of power from nuclear fusion, the energy source of stars. ITER comprises a toroidal (doughnut-shaped) chamber in which a plasma (pink) is contained by strong magnetic fields. A plasma is an ionised gas, and its ionisation makes it susceptible to electromagnetic fields. By magnetically compressing and igniting a plasma inside ITER, researchers hope to be able to study the best way of using it to generate electricity. Reactions are due to begin in 2016
© MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY
Panoramic view of Mars
February 27 to March 2, 2005 - This is the Spirit panoramic camera's Lookout panorama, acquired on the rover's 410th to 413th martian days, or sols (February 27 to March 2, 2005). The view is from a position known informally as Larry's Lookout along the drive up Husband Hill. The summit of Husband Hill is the far peak near the center of this panorama and is about 200 meters (656 feet) away from the rover and about 45 meters (148 feet) higher in elevation. The bright rocky outcrop near the center of the panorama is part of the Cumberland Ridge, and beyond that and to the left is the Tennessee Valley.
The panorama spans 360 degrees and consists of images obtained in 108 individual pointings and five filters at each pointing. This mosaic is an approximately true-color rendering generated using the images acquired through panoramic camera's 750-nanometer, 530-nanometer, and 480-nanometer filters. The lighting varied considerably during the four sols that it took to acquire this image (partly because of imaging at different times of sol, but also partly because of small sol-to-sol variations in the dustiness of the atmosphere), resulting in some obvious image seams or rock shadow variations within the mosaic. These seams have been smoothed out from the sky parts of the mosaic in order to simulate better the vista that a person would have if they were viewing it all at the same time on Mars. However, it is often not possible or practical to smooth out such seams for regions of rock, soil, rover tracks, or solar panels. Such is the nature of acquiring and assembling large Pancam panoramas from the rovers.
Spirit's tracks leading back from the West Spur region can be seen on the right side of the panorama. The region just beyond the area where the tracks made their last zig-zag is the area known as Paso Robles, where Spirit discovered rock and soil deposits with very high sulfur abundances. After acquiring this mosaic, Spirit drove around the Cumberland Ridge rocks seen here and is now driving up the flank of Husband Hill, heading toward the summit
© Stocktrek Images