NATS 1745.thursmarch23.docx

NATS 1745.thursmarch23.docx - NATS 1745 THURS MARCH 23...

This preview shows page 1 - 2 out of 6 pages.

NATS 1745 THURS MARCH 23 Betelgeuse by it self is about 8 solar mass If it reaches 1.4 solar mass, it collapses on itself anf maybe becomes neutron star and it explodes Explosion is bigger than normal star Burned if within 100 light years All these radioation Radio, infra red, visible light, gamma, doesn’t matter…. They all travel at the speed of light discovered by Maxwell in 1864 Clausius discovered concept of entropy MOST IMPORTANT LAW –SECOND LAW OF THERMODYNAMICS RIEMANN put all the geometries together in mathematical notation Then evidence of gravity behaving not normally when too close to it (mercury doing funny thing sand could not ecplain it with Newtonian gravity) but at the end Einstein general relativity explains it Maxwell put all different lights and radiation into one category of electromagnetic radiation spectrum (difference is wavelength and frequency) Hertz discovered radiowaves Michelson and Morley discovered the anomaly which ended up being solved by special relativity (tried to solve earth speed relative to aether) Gamma ray discovered by berqul Electron was detected by jj Thompson in 1897 You should use gamma ray or xray to get best pictyre But if you are using gamma ray to measure electron, you are firing gamma ray at electron but this gamma ray has so much energy that it kicks electron and it kicks back so fast that the velocity of electorn cannot be measured at all. Magnetic field also has some effect on emission line created by atoms, which was used to understand the magnetic field of the stars or the sun.
Image of page 1

Subscribe to view the full document.

RUTHERFORD discovers alpha and beta rays if you have a piece of radioactive material, soon it will DECAY. Every half life time, half decays and half stays same. when it decays, it releases some particle both alpha and beta are charged object there are also gamma ray coming out of radioactive decay structure of atom: current model is jj thomspn model Rutherford takes gold because you can stretch gold in a way that it becomes so thin like paper but you can assume you have a layer of atoms of gold He fired alpha particles at it He knows alppha 4x heavier than hydrogen When you shoot particle at layer at high velocity, most particles pass through the gold paper and once in a while, one of them is reflected back completely and doesn’t pass through. 1/100,000 do not pass thorugh This happens becuat it hits the nucleus that is so heavy soit is reflected back A lot of particles pass through and one is reflected so therefore atom is made up of EMPTY SPACE. 99000 pass through and 1 is reflected back Not all pass through, some are deflected a little and some more. This is because all
Image of page 2
You've reached the end of this preview.
  • Fall '11
  • RobinMetcalfe

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern