Instead, the Keck uses the combined light that rails on thirty-six mirrors. A fourth famous reflector telescope, the Keck Telescope situated on a mountain in Hawaii, does not use a single large mirror to collect the light. This huge reflecting telescope was for many years the largest reflecting telescope in the world until an even larger reflecting telescope was built in the Caucasus Mountains. Another telescope stands on Mount Palomar in California. The world's largest refracting telescope is located at the Yerkes Observatory in Williams Bay, Wisconsin. Very much larger optical telescopes can now be found in many parts of the world, built on hills and mountains far from city lights. Because Newton used a mirror, his telescope was called a reflector. This mirror concentrated the light and reflected a beam of light to the eyepiece at the other end of the telescope. He solved this problem by designing a new type of telescope that used a curved mirror. This meant that when Newton looked through the refracting telescope, the images of bright objects appeared with a ring of colors around them. However, the curved front lens also caused the light to be separated into colors. The type of telescope that Galileo designed is called a refractor because the front lens bends, or refracts, the light. When Isaac Newton began using Galileo's telescope more than a century later, he noticed a problem. One of the guests suggested a name for the device: telescope. In April of 1611, Galileo showed his device to guests at a banquet in his honor. In 1610 Galileo used his version to make observations of the Moon, the planet Jupiter, and the Milky Way. In the e year, someone described the 'looker' to the Italian scientist Galileo, who made his own version of the device. In 1608 he tried to sell his invention unsuccessfully. Soon after that, he invented a device that he called a 'looker,' a long thin tube where light passed in a straight line from the front lens to the viewing lens at the other aid of the tube. The owner of the shop, Hans Lippershey, looked through the lenses and was amazed by the way they made the nearby church look so much larger. Read the following passage and mark the letter A, B, C, or D on, your answer sheet to indicate the correct answer to each of the questions.Īccording to some accounts, the first optical telescope was accidentally, invented in the 1600s by children who put two glass lenses together while playing with them in a Dutch optical shop.

Radio waves are larger than light waves