Binoculars are used for viewing far objects like buildings‚ birds‚ and much more. Other information related to the devices Telescope The earliest recorded working telescopes were the refracting telescopes that appeared in the Netherlands in 1608. Their development is credited to three individuals: Hans Lippershey‚ Zacharias Janssen and Jacob Metius. Binoculars The telescope was introduced to astronomy in 1609 by the great Italian scientist Galileo Galilei. Periscope In 1854 Hippolyte Marié-Davy
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Technology Devices to Overcome the Limitations of Sight and Hearing Humans have sight and hearing limitation. Without any devices‚ our sight and hearing was limited. Most of the limitation of sight can be overcome with the help of certain optical instruments such as magnifying glass‚ microscope‚ binoculars and others. The range of frequency of hearing in human 20 Hz to 20 000 Hz. It was different according to the age of a person. Hearing limitations can be overcome by using devices such as
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I Introduction Technology I.1 What is technology? I.2 First inventors I.3 How science affects technology I.4 How technology affects science I.5 Discussion questions 2 Chemistry connects to . . . . . . I.1 What is technology? Think for a moment what it might be like to live in the 14th century. Image that you could travel back in time and found yourself in a small European village in 1392. What do you think you would find
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INTRODUCTION Defects of Hearing •Hearing defects means ear is not working correctly or as well as it should. •It may occur in more than one part of the ear. •1. DEAF-full or partial decrease in the ability to detect or understand sounds. Deaf usually caused by : - Eardrum is torn-cannot function - Ossicle bone fused together-can’t vibrate - Auditory nerve damaged by loud sound - Cochlea damage due to sickness/ drugs •2. Temporary hearing loss-build-up of earwax •3. Presbycusis- hearing loss
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stars and planets tha tare very far from Earth. Limitation of sight is whereby a person is able to see an object‚ colour‚ shape until a certain extend. Limitations of sight can be overcome by using appropriate optical devices such as microscope‚ telescope‚ periscope and others. Limitation Of Hearing We cannot hear all the sounds around us. The range of frequency of hearing in human is from 20 Hz to 20 000 Hz. It is different according to the age of a person. Different people have different
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Chapter 2 Mirror Design For Optical Telescopes The reflector mirror is the most important component of an astronomical optical telescope. This chapter provides discussions on the requirements for astronomical optical mirrors; the ways to reduce mirror weight‚ mirror cost‚ and mirror materials; the methods of mirror figuring‚ polishing‚ and surface coating; the design of mirror support mechanism; the concept of mirror seeing; and the stray light control. Emphasis is placed on various mirror
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an engineer’s transit or theodolite. 2. Background: The telescope of an engineer’s transit‚ theodolite‚ plane table alidade‚ and many levels are furnished with stadia hairs in addition to the regular cross hairs. One stadia hair‚ the upper cross hair‚ is above and the other‚ the lower cross hair‚ an equal distance below the middle cross hair. The process of taking stadia measurements consists of observing‚ through the telescope‚ the apparent locations of the two stadia hairs on the rod‚ which
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Mirrors in Telescopes The human eye cannot detect much light because of the small diameter of the retina‚ so telescopes and microscopes are used to help us see more than what humans are naturally capable of. Lenses and mirrors are the two things that can make a star that is a billion miles away look like it so much closer. Arizona is home to one of largest telescopes in the world‚ the Large Binocular Telescope. It has two twenty-seven foot mirrors to create the best and clearest image for the
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Brief History Binoculars were originally based from the telescope. Hans Lippershey‚ a spectacle maker‚ was the one who invented the telescope. Lippershey’s apprentice discovered that when holding 2 lenses in the same eye‚ with one lense distant from the other and looked through both‚ a far object seemed magnified or bigger. From there‚ Lippershey experimented with the lenses and was later known as telescope. Years later‚ Galileo Galilei developed Lippershey’s invention and was
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Historical tools Telescope One of the most historical tools was the telescope. Which Galileo Galilei perfected the telescope that was originally created by Hans Lippershey. Most of the earliest versions of the telescope used a curved lens made of polished glass at the end of a tube to magnify objects to a factor of 3x. Galileo was the first person to actually see different masses far within space. It gave way for scientists to see stars‚ planets‚ and space. Also‚ the telescope helped scientists
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