Pound-Rebka Experiment - Astronomy

Pound-Rebka Experiment - Astronomy

Pound-Rebka Experiment Experiment Background Experiment done in 1959 at Harvards Jefferson laboratory to test Gravitational Red-Shift of light predicted by Einsteins Theory of General Relativity Background Information

Principle of Equivalence states that the force of a gravitational field is equivalent to the acceleration of a given reference system. From the Principle of Equivalence we can also conclude that any frequency shift in light produced by acceleration can also be produced by the appropriate gravitational field. This is like a relativistic Doppler shift.

Experiment Set Up 2 Light Sources- 1 on top of the 22.5 meter laboratory, 1 in the basement.

Experiment Set Up Hypothesized that the Gamma Rays emitted from basement would have a gravitational red shift and Gamma Rays emitted from the roof would have a gravitational blue shift. Prepared the Gamma Ray detectors out of a combination of Iron and Cobalt heated to a high temperature to increase its

sensitivity and resolution to red shift. Equations Used in Experiment By using equations for gravitational potential energy and the relativistic energy expression, the gain in energy of a photon which falls a distance h is : Equations Used in Experiment

Difference in energy shifts from the 2 gamma ray emissions was predicted to be: While it was measured as: Results Basement emitted gamma ray of wavelength

of 1 measured on roof as having wavelength of 1.000000000000002455 Roof emitted gamma ray of wavelength 1 measured in basement as having wavelength of .99999999999999755

Implications The measured energy difference and gravitational shift was within the error margin of the predicted value by General Relativity Experiment claimed as Proof of General Relativity Bibliography

Harvard Gravitational Red Shift Experiment. http://www.circlon-theory.com/HTML/poun dRebka.html Equivalence Principle. http://en.wikipedia.org/wiki/Equivalence_pr inciple Gravitational Red Shift. http://hyperphysics.phy-astr.gsu.edu/hbas

e/relativ/gratim.html

Recently Viewed Presentations

  • Tuesday, Aug 20, 2019

    Tuesday, Aug 20, 2019

    Calibri Arial Calibri Light Georgia Office Theme Thursday, Aug 22, 2019 Home Work Answers - Tues/Wed Home Work Answers - Tues/Wed Home Work Answers - Tues/Wed Review for Test PowerPoint Presentation PowerPoint Presentation PowerPoint Presentation PowerPoint Presentation PowerPoint Presentation PowerPoint...
  • Spectral Graph Theory (basics) - Carnegie Mellon University

    Spectral Graph Theory (basics) - Carnegie Mellon University

    Spectral Graph Theory (Basics) Charalampos (Babis) Tsourakakis. CMU. ... Reminders . Adjacency matrix. Intuition behind eigenvectors: Bipartite Graphs. Walks of length k. Case Study: Triangles. Laplacian. ... The image of the unit circle (sphere) under any mxn matrix is an...
  • Standard 0.1 M NaOH

    Standard 0.1 M NaOH

    Standard 0.1 M NaOH Std. 0.1M NaOH Dry primary-standard-grade potassium hydrogen phthalate @ 110oC for an hour to remove the presence of moisture in the standard. Store in desiccator. Boil 1L of DI-H20 to expel CO2. Store in a polyethylene...
  • Mesopotamia SPICE Chart - Weebly

    Mesopotamia SPICE Chart - Weebly

    Interactions. Nile River. Predictable yearly flooding. Irrigation. Calendar. Surrounded by desert. Provides a natural barrier. Papyrus: a paper-like writing material created from the papyrus plant that grows on the banks of theNile River
  • EECS 252 Graduate Computer Architecture Lec XX - TOPIC

    EECS 252 Graduate Computer Architecture Lec XX - TOPIC

    Graduate Computer Architecture Lec 9 - Limits to ILP and Simultaneous Multithreading Base on slides by David Patterson Review from Last Time Interest in multiple-issue because wanted to improve performance without affecting uniprocessor programming model Taking advantage of ILP is...
  • Renewable Energy Technology: Policy, Programs, and Possibilities

    Renewable Energy Technology: Policy, Programs, and Possibilities

    In accordance with the Department of Labor and Industry's statute 326.0981, Subd. 11,"This educational offering is recognized by the Minnesota Department of Labor and Industry as satisfying 1.5hours of credit toward Building Officials and Residential Contractors code/energy continuing education requirements."For...
  • The Mormon Cultural Landscape and Region Cultural Landscape

    The Mormon Cultural Landscape and Region Cultural Landscape

    Sphere: zone of outer influence. only certain elements still evident. People of identified culture are a minority. Mormon Culture Region Today. Use the following maps to determine the boundaries of the core, domain and sphere of the Mormon Culture Region...
  • XXX - southsouthnorth.org

    XXX - southsouthnorth.org

    LEDS GP is a network of public and private practitioners and institutions delivering Low Emissions Development Strategies (LEDS) and Nationally Determined Contributions (NDCs) - locally, nationally and internationally.