Homework 2 (telecsopes) MS-Word
... 2. (2 pts.) Why do optical astronomers usually put their telescopes at the top of mountains? Why do they prefer isolated sites? ...
... 2. (2 pts.) Why do optical astronomers usually put their telescopes at the top of mountains? Why do they prefer isolated sites? ...
Light and Other Forms of Radiation
... Different wavelengths are focused at different focal lengths (prism effect). Can be corrected, but not eliminated by second lens out of different material. • Difficult and expensive to produce: All surfaces must be perfectly shaped; glass must be flawless; lens can only be supported at the edges ...
... Different wavelengths are focused at different focal lengths (prism effect). Can be corrected, but not eliminated by second lens out of different material. • Difficult and expensive to produce: All surfaces must be perfectly shaped; glass must be flawless; lens can only be supported at the edges ...
Interference6
... particular data type. In optics, to form a greater picture based on the combination of the two sources. ...
... particular data type. In optics, to form a greater picture based on the combination of the two sources. ...
Introduction to the Dobsonian Telescopes
... Angular separation is how big an angle you can still perceive two separate stars as separate. The Human eye can only see 1/60th degree (1 arc minute) Also, the human eye transmits signal continuously to brain, so it cannot see very dim objects well. Telescopes – with them we can see much smaller ang ...
... Angular separation is how big an angle you can still perceive two separate stars as separate. The Human eye can only see 1/60th degree (1 arc minute) Also, the human eye transmits signal continuously to brain, so it cannot see very dim objects well. Telescopes – with them we can see much smaller ang ...
My first observations through a telescope were at the age of about 8
... across the optics books written by Sam Brown. They were written for a guy just like me with plenty of illustrations and diagrams. The one that got the most use was All About Telescopes, which I still have and still reference. This book started my journey down the road of telescope making. As they sa ...
... across the optics books written by Sam Brown. They were written for a guy just like me with plenty of illustrations and diagrams. The one that got the most use was All About Telescopes, which I still have and still reference. This book started my journey down the road of telescope making. As they sa ...
Document
... • Lowest cost per inch of aperture • Reasonably compact and portable up to focal lengths of 1000mm. • Excellent for faint deep sky objects such as remote galaxies, nebulae and star clusters. • Reasonably good for lunar and planetary work. • Low in optical aberrations. ...
... • Lowest cost per inch of aperture • Reasonably compact and portable up to focal lengths of 1000mm. • Excellent for faint deep sky objects such as remote galaxies, nebulae and star clusters. • Reasonably good for lunar and planetary work. • Low in optical aberrations. ...
Section 1 - MrTestaScienceClass
... a. you can see _______ of stars & other objects with this type of telescope, but only about ________ stars without a telescope b. this type of telescope collects visible light and focuses it to a __________ _________ for observation i. focal point – point where the rays of _______ pass through a len ...
... a. you can see _______ of stars & other objects with this type of telescope, but only about ________ stars without a telescope b. this type of telescope collects visible light and focuses it to a __________ _________ for observation i. focal point – point where the rays of _______ pass through a len ...
Topic 2 Assignment - Science 9 Portfolio
... lenses to gather and focus the light from the stars. A process called ‘spin-casting’ today makes mirrors, by pouring molten glass into a spinning mould. The glass is forced to the edges, cooled and solidified. Mirrors as large as 6m across have been made using this method. An innovation for ground-b ...
... lenses to gather and focus the light from the stars. A process called ‘spin-casting’ today makes mirrors, by pouring molten glass into a spinning mould. The glass is forced to the edges, cooled and solidified. Mirrors as large as 6m across have been made using this method. An innovation for ground-b ...
Physics 1025: Lecture 7 Properties of light (con`t), n, Dispersion
... There are four main types of telescopes: refractors, reflectors, Schmidt camera, and radio telescopes (plus many exotic new gamma-ray, x-ray, infra-red, types). Refractors were discussed above, typified by a simple Galilean telescope. Disadvantages of refractors: 1) Weight hard to handle so glass do ...
... There are four main types of telescopes: refractors, reflectors, Schmidt camera, and radio telescopes (plus many exotic new gamma-ray, x-ray, infra-red, types). Refractors were discussed above, typified by a simple Galilean telescope. Disadvantages of refractors: 1) Weight hard to handle so glass do ...
Chapters 5,12
... The mission of the Submillimeter Wave Astronomy Satellite (SWAS), launched in 1998, is to investigate interstellar clouds within which stars form. One of the frequencies at which it observes these clouds is 557 GHz (1 GHz = 1 gigahertz = 109 Hz), characteristic of the emission from interstellar wate ...
... The mission of the Submillimeter Wave Astronomy Satellite (SWAS), launched in 1998, is to investigate interstellar clouds within which stars form. One of the frequencies at which it observes these clouds is 557 GHz (1 GHz = 1 gigahertz = 109 Hz), characteristic of the emission from interstellar wate ...
Document
... Can you read a street sign a block away? Can you see the binary star in the Big Dipper with your naked eye? ...
... Can you read a street sign a block away? Can you see the binary star in the Big Dipper with your naked eye? ...
Lecture 12
... –It’s difficult to fabricate very large lenses –Mirrors only need to be polished on one side –Lenses can only be supported on the (thin) edge –Mirrors can be supported along the entire back –Mirrors have no problem with chromatic aberration ...
... –It’s difficult to fabricate very large lenses –Mirrors only need to be polished on one side –Lenses can only be supported on the (thin) edge –Mirrors can be supported along the entire back –Mirrors have no problem with chromatic aberration ...
Light and Telescopes - Otterbein University
... Problems with Refractors • Different colors (wavelengths) bent by different amounts – chromatic aberration • Other forms of aberration • Deform under their own weight • Absorption of light • Have two surfaces that must be optically perfect ...
... Problems with Refractors • Different colors (wavelengths) bent by different amounts – chromatic aberration • Other forms of aberration • Deform under their own weight • Absorption of light • Have two surfaces that must be optically perfect ...
Due November 10 at the start of class Michelson Interferometer (30%)
... B. In the above case the intensity of the reflected light is small but not zero. Explain. What need to be changed, and by how much, to make the intensity of the reflected light zero? 3) Diffraction from the Lens Pupil (25%) An excellent camera lens of 60 mm focal length is accurately focused for obj ...
... B. In the above case the intensity of the reflected light is small but not zero. Explain. What need to be changed, and by how much, to make the intensity of the reflected light zero? 3) Diffraction from the Lens Pupil (25%) An excellent camera lens of 60 mm focal length is accurately focused for obj ...
04 Astronomical Tools
... X rays and gamma rays cannot reflect off mirrors as other wavelengths do. X rays can undergo Bragg reflection at very shallow angles and they can be focused in special telescopes. ...
... X rays and gamma rays cannot reflect off mirrors as other wavelengths do. X rays can undergo Bragg reflection at very shallow angles and they can be focused in special telescopes. ...
The Hubble Space Telescope Spherical Aberration – It All Started
... “warm” telescope would be futile. Indeed, to view objects in the 1-20m range, the optics of the telescope must be chilled to 5-70K. This solves the visibility problem, but creates a host of other problems inturn. In order to minimize the focus shift caused by different materials (each with its own ...
... “warm” telescope would be futile. Indeed, to view objects in the 1-20m range, the optics of the telescope must be chilled to 5-70K. This solves the visibility problem, but creates a host of other problems inturn. In order to minimize the focus shift caused by different materials (each with its own ...
Status of the Hybrid Doppler Wind Lidar (HDWL) Transceiver ACT
... Test windows have been ordered. Preparing to test coatings with high powered lasers. ...
... Test windows have been ordered. Preparing to test coatings with high powered lasers. ...
Astronomy Tools
... – Easier to build than refractors Eyepiece – Lightweight and better fe resolution fo Objective Mirror ...
... – Easier to build than refractors Eyepiece – Lightweight and better fe resolution fo Objective Mirror ...
Big Telescopes
... the Earth’s Atmosphere • Even at wavelengths where the atmosphere is transparent, the atmosphere “blurrs” light – Why to stars “twinkle” (scintillation)? – The condition of the sky for viewing is referred to as seeing – Distorted seeing can be improved by adaptive optics ...
... the Earth’s Atmosphere • Even at wavelengths where the atmosphere is transparent, the atmosphere “blurrs” light – Why to stars “twinkle” (scintillation)? – The condition of the sky for viewing is referred to as seeing – Distorted seeing can be improved by adaptive optics ...
Telescopes - ESS I. Uses for telescopes-
... i. Detects the smallest waves Electromagnetic Spectrum- know the order from long to short wavelength a. Radioi. Longest wavelength b. Microwavei. used by cell phones c. Radari. good for tracking objects (speed, weather…) ...
... i. Detects the smallest waves Electromagnetic Spectrum- know the order from long to short wavelength a. Radioi. Longest wavelength b. Microwavei. used by cell phones c. Radari. good for tracking objects (speed, weather…) ...
The Great Observatories - Center for STEM Education
... and knowing the diameter of the Earth's orbit, astronomers are able to calculate the parallax angle across the sky. If you follow the line on the diagram from the Earth in January to the appearance of the star in January, then the line from the Earth in July to the appearance of the star in July, yo ...
... and knowing the diameter of the Earth's orbit, astronomers are able to calculate the parallax angle across the sky. If you follow the line on the diagram from the Earth in January to the appearance of the star in January, then the line from the Earth in July to the appearance of the star in July, yo ...
Telescopes and Astronomical Instruments
... diameters 5 times bigger). • It is above all the atmospheric turbulence, so it can take really sharp images (better than any ground telescope), even though it isn’t as big. • It is above all the atmospheric blocks, so it can see wavelengths we cannot access from the ground (both infrared and ultravi ...
... diameters 5 times bigger). • It is above all the atmospheric turbulence, so it can take really sharp images (better than any ground telescope), even though it isn’t as big. • It is above all the atmospheric blocks, so it can see wavelengths we cannot access from the ground (both infrared and ultravi ...
Reflecting telescope
A reflecting telescope (also called a reflector) is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for very large diameter objectives. Almost all of the major telescopes used in astronomy research are reflectors. Reflecting telescopes come in many design variations and may employ extra optical elements to improve image quality or place the image in a mechanically advantageous position. Since reflecting telescopes use mirrors, the design is sometimes referred to as a ""catoptric"" telescope.