Lecture15 - Big Bang Black Holes No Math Dr Jonathan Asaadi...

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Big Bang, Black Holes, No Math Dr. Jonathan Asaadi Dr. Jonathan Asaadi The Big Bang The Big Bang Big Bang, Black Holes No Math Topic: The Big Bang 1
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Paper 1 Paper 1 is due March 5th @ 3:00 pm Subject: “What is the scientific evidence for the big bang?” Format: 3 pages, Size 14 times new roman font, 1.5 line spacing, standard margins Paper 1 Rubric / Paper 1 Gradesheet (both available on Blackboard) should provide a very good outline to what I am looking for Will be submitted through TurnItIn.com NO LATE PAPERS ACCEPTED Not for any reason, not no way, not no how Helpful Hints: Use the Roosevelt writing center Your grandmother should be able to pick up your paper and understand it I will review rough drafts up till next Tuesday (afterwards I don't have time to get it back to you and it be useful)
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Log onto Blackboard Enter your user name and password (this is your Roosevelt ID) Click on RU Courses Click on PHSC108...LEC Click on Weekly Lessons tab on the left hand side of the screen Scroll down and click on Paper 1 link Follow the instructions Paper 1
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In Class Quiz # 11 1) What was the name of the two scientists who first discovered the Cosmic Microwave Background (last names will due)? 2) What was it that the two scientists who first discovered the Cosmic Microwave Background were trying to detect? 3) What is the fraction of Hydrogen and Helium in the universe? A) 90% Hydrogen, 10% Helium B) 75% Hydrogen, 25% Helium C) 75% Helium, 25% Hydrogen D) 90% Helium, 10% Hydrogen
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The first piece of evidence for the Big Bang is General Relativity. General Relativity is the idea that the laws of science should be the same for all viewers, regardless of how they are moving. Looking at all distant galaxies, they always appear to be moving away from us. No matter which direction we look, the galaxies are still moving in the same direction. This means that yesterday the galaxies were closer to us than today, and tomorrow galaxies will be further away from us than today. To be able to tell how fast and what direction the galaxies are moving we use the Doppler shift. Doppler shift is the change in frequency of light or sound that confides on the relative motion of the cause and the bystander. The longest wavelengths arrive at the red end of the spectrum, while the shortest wavelengths arrive at the blue end of the spectrum. Because the galaxies are constantly moving away from us, the wavelength of waves we obtain will be longer. Therefore, the galaxies that are moving away from us will appear at the red end of the spectrum. Everyday the universe is expanding and the distance between each galaxy is growing all the time.
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