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…fibre optics transmit light. A section on eye defects, where you increase the focal length of a spectacle lens and see what that does to the light rays will make an awesome teaching tool. Though it comes with worksheets, those with time to spare can use…

…times a week. Then in 1937 an electronic system using the cathode-ray tube was adopted by the BBC in England. The 1947 broadcast of the World Series got viewers attention of the growing impotance of TV. By the end of the 1950's, nearly 90 percent…

…is with ultrasound. This test forms a picture based on sound waves that can be seen on a TV. It shows the size of the pancreas and the possible presence of a tumor. They also use CT scans with X-ray machines, which show how far the cancer has spread. MRI’s also do…

…’ split and cause a nuclear reaction. (General Information) When a free neutron splits a nucleus, energy is released along with free neutrons, fission fragments that give off beta rays, and gamma rays. A free neutron from the nucleus that just split…

…forward (flexion). Par fractures often show up on plain X-rays, but where they are not obvious on X-ray they usually show up on a bone scan. For the young patient with spondylolisthesis, we usually recommend a carefully prescribed program of rehabilitation…

…for Jim, Judy, Plato, and Jim’s parents. Nicholas Ray seems to be saying that in order for their children to move from the imaginary to the symbolic, fathers must be up to the challenge of offering guidance. Rebel without a Cause has as much to say today…

…irregularities and symptoms of congestive heart failure. 1 An X-ray, MRI or CAT scan finds most aneurysms, or it is found after it ruptures. The development of a cerebral aneurysm is still unknown. They are rarely found in people under the age of twenty…

…, they started blocking out deadly u.v. rays from the sun. The sun's rays made life outside of water nearly impossible. These changes made life on land possible and evolution occurred as prokaryotes gave rise to land living eukaryotes. The microfossil record…

…the patient to stand on their toes. Failure to do this concludes the Achilles is ruptured. A x-ray or MRI is not necessary but can confirm the severity of the injury. Some x-ray films of certain injuries actually yield peices of the calcaneus broken away from…

…to study the mysterious rays given off by uranium as her thesis. A scientist Henri Becquerel had first discovered these rays in 1896. She set up her equipment in a small, glass-walled shed at the School of Physics. Within just two months she had made two…