1 / 21

Short office hours today

Short office hours today. The Barn Door Paradox. Lorentz Transformation. Lorentz transform. Galilean Transformations. The Lorentz Transformations. 4-vector. Faster than Light. Blah blah blah.

max
Download Presentation

Short office hours today

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Short office hours today

  2. The Barn Door Paradox

  3. Lorentz Transformation Lorentz transform

  4. Galilean Transformations

  5. The Lorentz Transformations

  6. 4-vector

  7. Faster than Light Blah blahblah

  8. Captain Kirk, at the edge of the galaxy but at rest with respect to the earth, receives an instantaneous message from earth. How fast must I be going (relative to earth) in order to observe that the message was received before it was sent? A : a very tiny velocity B : 0.5 c C : c D : I cannot see it received before it was sent.

  9. Causality

  10. Velocity Transformations What two velocities can two people in two different inertial reference frames agree on?

  11. Two spaceships leave Earth traveling at a velocity of 0.5 c in opposite directions . . .

  12. Achilles and the Trailer Bed Like the fabled Achilles, who was immune to every lethal blow except to his heel, many of us have a special weakness that can be exploited to our spiritual downfall. For some, that weakness may be a taste for liquor, an unusual vulnerability to sexual temptation, or a susceptibility to compulsive gambling or reckless speculation. For others, it may be a craving for money or power. If we are wise, we will know our weaknesses, our spiritual Achilles' heels, and fortify ourselves against temptations in those areas. BY ELDER DALLIN H. OAKS - Ensign Oct. 1994

  13. Relativistic Momentum

  14. According to the special theory of relativity, if a 30-year old astronaut is sent on a space mission is accelerated to speeds close to that of light, and then returns to earth after 20 years as measured on earth, what would be his biological age upon returning? • Less than 50 years • 50 years • More than 50 years

  15. Individual question: We see a spaceship flying past at 0.9c. The captain of the spaceship launches a missile, which she sees leaving her ship at 0.9c out the front. We see the missile traveling at • A speed less than c • A speed equal to c. • A speed greater than c.

  16. Discussion question: The observed relativistic length of a super rocket moving by the observer at 0.70 c will be what factor times that of the measured rocket length if it were at rest? • 0.45 • 0.71 • 0.82 • 1.4 • 1.9

  17. Discussion question: The crew of a spaceship watches a movie that is two hours long in a spacecraft that is moving at high speed through space. An Earthbound observer, who is watching the movie through a powerful telescope, measures the duration of the movie to be . . . • Less than 2 hours • 2 hours • More than 2 hours Notice I wrote “measure the duration” rather than “see the movie.”

  18. According to the special theory of relativity, if a 30-year old astronaut is sent on a space mission is accelerated to speeds close to that of light, and then returns to earth after 20 years as measured on earth, what would be his biological age upon returning? • Less than 50 years • 50 years • More than 50 years

  19. Thought question: We see a spaceship flying past at 0.9c. The captain of the spaceship launches a missile, which she sees leaving her ship at 0.9c out the front. We see the missile traveling at • A speed less than c • A speed equal to c. • A speed greater than c.

More Related