Manfra9 - Course Business: PHYS342 Lecture 9 3nd problem...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Course Business: PHYS342 Lecture 9 3nd problem set due this Friday. There will be an in class practice exam given this Friday. Use this time to prepare for the real exam on Feb 11th. You can keep the exam after class, solutions will be posted over the weekend.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2.10: The Doppler Effect A similar change in sound frequency occurs when the source is fixed and the receiver is moving. But the formula depends on whether the source or receiver is moving. The Doppler effect in sound violates the principle of relativity because there is in fact a special frame for sound waves. Sound waves depend on media such as air, water, or a steel plate in order to propagate. Of course, light does not! Christian Andreas Doppler (1803-1853) The Doppler effect for sound yields an increased sound frequency as a source such as a train (with whistle blowing) approaches a receiver and a decreased frequency as the source recedes.
Background image of page 2
Waves from a source at rest Viewers at rest everywhere see the waves with their appropriate frequency and wavelength.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Recall th e D o p p l er Effect A receding source yields a red-shifted wave, and an approaching source yields a blue-shifted wave. A source passing by emits blue- then red- shifted waves.
Background image of page 4
The Relativistic Doppler Effect So what happens when we throw in Relativity? Consider a source of light (for example, a star) in system K receding from a receiver (an astronomer) in system K with a relative velocity v . Suppose that (in the observer frame) the source emits
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 16

Manfra9 - Course Business: PHYS342 Lecture 9 3nd problem...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online