... telescope, which uses a lens to attract light was developed by a Dutch optician in 1608 named Hans Lippershey. Two other inventors were Zacharias Jannssen and Jacob Metius. However, Galileo perfected the refracting telescope within a year and he became the first one to point a telescope up to the sky for observation. Refracting telescope: Refraction refers to the bending of light when it passes from one medium ... : the lens is so thick in the center and thin on the edges, that it can't be supported properly and becomes deformed causing light to come into focus at different focal lengths...

• Word Count: 3183
• Approx Pages: 13
• Grade Level: High School

... or refract or bend if traveling into a different medium (Henderson par 75). par Reflection of a sound wave can be compared to the reflection of light waves from a mirror. This occurs when the wave encounters something in its path and that something causes the wave to be reflected off of it ... the conversation would have been the diffraction of the sound waves produced by your sibling quote s voice traveling through the door (Henderson par 82). par One of the last types of behavior that a sound may experience is called refraction . Refraction occurs when the waves change in direction as t...

• Word Count: 3743
• Approx Pages: 15
• Grade Level: High School

... was summited, many countries raced to put their men on first. The first attempt to tackle Everest was in 1922, a British team led by General C.G. Bruce, but the mission proved unsuccessful. An avalanche killed seven Sherpas and the expedition was abandoned. The next expedition was launched in ... equipment. Each summer, tropical heat over the Indian Ocean creates a large mass of humid air that is drawn across India, toward the Himalaya, by the convection currents rising over the massive, 5-kilometer high Tibetan Plateau. When this water saturated wind, associated with the summer southw...

• Word Count: 3189
• Approx Pages: 13
• Has Bibliography
• Grade Level: High School

... stems from this desire to capture life, but painting as well as photography is an art form therefore involving an artist's judgement and controlled by a person. It was not until the early 19th century that photography became a possibility and images were captured straight onto silver copper plate at ... of movement repeating over and over. Even the Fusil Photographique' of Marré (1882) could only capture a very small amount of movement by taking multiple still photographs. It was not until the invention of the Kinetograph and Kinetoscope that moving images could be displayed for public ...

• Word Count: 4060
• Approx Pages: 16
• Has Bibliography
• Grade Level: Undergraduate