PPT-The Doppler Effect and the expansion of the Universe

1 What do you know about renowned scientist Stephen Hawking What is his field of expertise In which university is he an honorary professor Stephen William Hawking January 8 th 1942 is a British theoretical physicist Hawking was a Professor at the University of Cambridge between 1979 and 2009 . 16.9 The Doppler Effect. 16.9 The Doppler Effect. 16.9 The Doppler Effect. The . Doppler effect. is the change in frequency or pitch of a wave for an observer moving relative to its source.. Source Moving Towards Observer. Homogeneous and uniform cosmic expansion . Hubble constant determines scale factor . Hubble diagram was based on a limited distance scale calibrated by Cepheid variable stars in relatively nearby galaxies. Recap from Last week…. Solving decibel problems requires knowledge of logarithmic functions.. logA. - . logB. = log(A/B). I=I. 0. I= .  . Intensity Level (a.k.a., loudness). Sound Intensity. Example. with . M. ulti-wavelength. . Polarimetry. Silvano . Fineschi. INAF-Torino Astrophysical . Observatory, . Italy. 25. . May, . 2013, . Bern (CH). Coronal. . Magnetism. Line . formation. in . magnetized. Significance . of a dark night . sky. The Universe . is expanding. The . Big Bang. initiated the expanding Universe. Microwave radiation . evidence . of the . Big Bang. The Universe was initially hot & opaque. , and Red-Shifts. The Doppler Effect. http://www.youtube.com/watch?v=Y5KaeCZ_AaY. Doppler Effect Explained . http://www.youtube.com/watch?v=-t63xYSgmKE&feature=related. http://www.youtube.com/watch?v=Djz_rtnXSfY. 16.9 The Doppler Effect. 16.9 The Doppler Effect. 16.9 The Doppler Effect. The . Doppler effect. is the change in frequency or pitch of a wave for an observer moving relative to its source.. Source Moving Towards Observer. Here are sound waves emanating from a motionless object. The D. ö. ppler Effect. Watch how the circles seem to be squished in the direction of motion.. The sound waves appear to be compressed (higher pitch) in the front, and extended (lower pitch) in the back. Effect & Redshift. Gharib ESS . As a wave source approaches, an observer encounters waves with a higher frequency. As the wave source moves away, an observer encounters waves with a lower frequency. . What is the current theory of the origin of the universe?. Evidence. Edwin . Hubble claims that the universe is expanding. .. Measured . light from galaxies over many years and was able to tell that they were all moving away form . Unit 3: Waves. Part 3: . Ms. Pacheco. South Oldham HS. The Doppler Effect. This apparent change in frequency due to the motion of the source (or receiver) is called the . Doppler effect. . . The greater the speed of the source, the greater will be the Doppler effect.. The universe is the sum of all energy, matter, space and time.. But there. ’. s a difference between the universe we see (the observable universe) . and the universe as it really exists.. This gets complicated….. 5. Curved Cosmos. & . Observational Cosmology. Einstein Field Equation. Cosmological Principle. General Relativity. . . . A crucial aspect of any particular configuration is the geometry of . :. None. Activities/Assignments:. Notebook . Organization. Acrostic Poem. Today in I.S.…. I.S. Learning Goal. :. I can analyze the factors used to explain the origin and evolution of the universe..