PPT-Telescopes 3 Functions 1. Gather light

Size does matter The bigger the better 2 Resolve detail 3 Magnification Only important for solar system objects Refracting Telescopes Cheap Good for bright objects Basic design Reflecting Telescopes. Essential Questions- You should be able to answer these questions by the end of the PowerPoint.. What is the purpose of a telescope?. How do refracting telescopes work?. How do reflecting telescopes work?. Telescopes. Key Concepts. What are the regions of the electromagnetic spectrum?. What are telescopes and how do they work?. Where are most large telescopes located?. Telescopes - Key Terms. Telescope. Telescopes were first invented around the year 1600. . Galileo . Galilei was an early astronomer who first used telescopes to view objects in our solar system. . He . made many important discoveries including: the moon was covered in mountains and Jupiter had 4 large moons.. Jon Holtzman. NMSU Astronomy. Telescopes are light buckets: bigger buckets collect more light, and faint (far away) objects don’t produce much light!. Why build bigger telescopes?. In principle, bigger telescopes make sharper images:. Optical Telescopes. Ground based and on satellites. Observations are recorded using a camera instead of the human eye most times. . This is so we can separate colors into light and using times to study changes over time.. The most important property of a telescope? . No, it’s not it’s “power” or magnifying ability, it is……. Its . Light Gathering . power! So, . t. he diameter of the mirror or lens is THE most important property. So, if you are not sure, do your best to guess.. Please bring pencil(s) so that you can fill out. the scantrons.. No other accessories (calculators, cell phones, …) are allowed.. Important: Anything in the posted slides that I did not cover in class could be on the exam.. Types of Telescopes. A telescope collects light over a large area and focuses it in a . small area where it can be viewed with an eye or a camera. This can be done in 2 ways:. Refracting Telescopes. Agenda. Turn in Displacement Lab work. Turn in Permission slips. Notes on . Studying Space & . Exploring . Space packet. Studying space from Earth. Tele. = distance. Scopos. = to watch. Light and radiation (energy in the form of waves that travel through empty space). How astronomers study space. Electromagnetic Radiation (EMR). Light can travel through empty space. All EMR travels at the speed of light. . 3 x 10. 8. m/sec. Astronomers study different types of EMR. Refraction is the _____________ of light as it passes through glass.. II. Reflection: . Reflection occurs when light _____________ off of a mirror.. F. f. I. Refraction: . Refraction is the ___. bending. History. In 1773 Herschel invented a large . reflecting . telescope and discovered Uranus. This was the first “new” planet.. In late 1800’s . Kuiper. found methane gas in Saturn’s moon with the largest . Agenda. Turn in Displacement Lab work. Turn in Permission slips. Notes on . Studying Space & . Exploring . Space packet. Studying space from Earth. Tele. = distance. Scopos. = to watch. Light and radiation (energy in the form of waves that travel through empty space). Diffraction of Light. Newton pointed . out in his 1704 book . Opticks. , that "Light is never known to follow crooked passages nor to bend into the shadow". . This concept is consistent with the particle theory, which proposes that light particles must always travel in straight lines..