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by: sashiel pina

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# And just a reminder of... Astronomy 1307

sashiel pina
UTEP
Introductory Astronomy
Hector Noriega-Mendoza

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COURSE
Introductory Astronomy
PROF.
Hector Noriega-Mendoza
TYPE
Class Notes
PAGES
5
WORDS
KARMA
25 ?

1 review
Luis

## Popular in Astronomy

This 5 page Class Notes was uploaded by sashiel pina on Monday October 12, 2015. The Class Notes belongs to Astronomy 1307 at University of Texas at El Paso taught by Hector Noriega-Mendoza in Summer 2015. Since its upload, it has received 32 views. For similar materials see Introductory Astronomy in Astronomy at University of Texas at El Paso.

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Date Created: 10/12/15
Doppler effect Today we Reviewed Studied the Doppler effect What is the Doppler effect 0 Change in color on the spectrum 0 The change is so subtle it forms line 0 The lines identify displacements blue to red shift 0 There is no other way to identify the Doppler effect wit out the lines o How fast the object is moving that is all we can conclude Blue shift or red shift 0 Zero shift lines are not shifted object is not moving not a realistic interpretation 0 We live in a dynamic universe therefore things are always shifting because it is expanding The only possibility to identify motions of stars Closebue farred If an object has a positive outcome after doing the formula the object is distancing away If an object has a negative out come after doing formula the object is approaching us Astronomy October 52015 Today we Discussed new generation telescopes largest telescopes as of now and is a re ector Large apertures 8m is min can be larger o It is impossible to build very large refractors due to weight which is why we use mirrors 0 Late 1980 s and 1990 s NGT S Larger telescopes create more light more sharper images and ability to see ne detail the larger the better 0 Aperture of 5m for the mirror 0 Large and light pieces of glass react very little to changes in temperature 0 When temp rises expands when temp drops temp contracts 0 Special type of glass which responds to temperature 0 Adaptive optics ability to change curvature when images are createdalso called deformable mirrors 0 Active process the computer is the one that helps modify the image to make it more clear 0 Adaptive objects in action The image being controlled often done by computer controlled actuators 0 Titan is the only satellite that is surrounded by a thick atmosphere Grandtelescope or GTC in Spain on Canarios island 0 And the Keck observatory in Hawaii both GTC and Keck are the largest telescopes on earth 0 Honey comb design easier than having to remove the mirror Different forms of light are absorbed before reaching the ground level A small portion of UV radiation passes through the atmosphere as well as Infrared Gamma Ray and X ray Infrared do not make It the ground Only in space can Gamma Rays be detected 0 The Ozone layer is responsible for tracking high radiation from the sun 0 Ozone consists of 3 oxygen atoms electrical bound 0 The energy of a gamma ray is high enough to break a molecule apart 0 Water vapor C02 observe infrared and microwaves they do not make it to the ground A Run Down of class astronomy 1307 September 212015 Today we Talked about electromagnetic spectrum 0 The highest and lowest frequencies 0 Colors visible to the human eye 0 Formula for nding wave length Issac Newton and the prism 0 Light is constant c Photons In short The electromagnetic spectrum consists of the different wave lengths frequencies and colors we can see traviulet shortwave gamma Iiirays rays mfrarati radar T J AM rays rays 1a 1a3912 l j 39 1aquotg 1rr39i I39D a la2 1 1H2 1134 quotII u Waaalaugth meters allquot Iquot a quotquot Visible Light quot E IIIquot quotIII 4titi 5 DD titi T if quotWavelength Hansmeters Table uf Cuntsuts Visual Stimulus As shown above after violet becomes ultra violet once ultra violet occurs in contrast As humans we can t see past gamma or radio waves After the color red on the spectrum we can not see anything below red as well 0 The formula which calculates speed of light 0 lssac Newton In the 17th century lssac newton put a prism and found that when there is a dense object light s speed changes just a little bit 0 In other words light will always travel at the same speed no matter where on the electromagnetic spectrum the only time it changes ls when there is a dense object but light travels 0 Light can be distinguished in two ways 1 photons 2 a wave 0 Wavelength is determined by looking at two arcs and measuring that distance Wave length Key Point frequency has to decrease as the length 0 grows or increases V ave The human eye can see between 40007000 of ocular light

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