Doppler Effect Doppler Effect – The apparent change in frequency of a wave due to the motion of the source and/or the observer Stationary Source – Moving.

Slides:

Advertisements

Similar presentations

The velocity of sound in glycerol is m/s

Advertisements

Sound. 1. The ____ of a sound is how high or low we hear its frequency. pitch.

Doppler Effect Moving Source.

Doppler Effect.

PHY 102: Waves & Quanta Topic 5 Sound John Cockburn Room E15)

1© Manhattan Press (H.K.) Ltd. Source moving Observer moving Observer moving 11.5 Doppler effect Both source and observer moving Both source and observer.

DOPPLER EFFECT This is the apparent change in the frequency of a wave motion as noted by an observer when there is relative motion between the source.

D OPPLER E FFECT. R ECAP FROM L AST WEEK … Intensity Level (a.k.a., loudness) Sound Intensity.

The Doppler Effect.

Doppler Shift + observer moving towards, - observer moving away, -source moving towards, + source moving away. v = speed of sound v o = observer speed.

***Doppler effect….

Created by Joshua Toebbe NOHS 2015

Chapter 15 - Sound Sound wave is a longitudinal wave.

Doppler Effect Physics 11.

Doppler Effect Doppler effect- an observable change in frequency. As a moving object approaches an observer the frequency goes up, as is moves away the.

Astrophysics and Cosmology The Wavelengths get “squished” in the direction of motion, and “stretched” in the opposite direction. Doppler Shift Longer,

CHAPTER 14 Sound Doppler Effect A train passes by you with its whistle/horn blowing. You hear one pitch (tone) as the train is coming towards you and a.

Goal: To understand sound Objectives: 1)To learn about Sound waves 2)To understand the Speed of sound 3)To learn about Doppler Shifts 4)To learn about.

Doppler Effect Change in frequency when a source of sound is moving relative to an observer. Source of sound moving Source of sound stationary Hears lower.

Sect. 12-6: Sound Wave Interference & Beats Like any other waves, sound waves can interfere with each other. Example Can lead to beats.

Waves. The time it takes for one wavelength to pass is called the period. The number of wavelengths passing at a given time is called frequency.

 For source moving away from observer, wavelength increases  Following the same procedures gives   For source moving away, f o

"I love hearing that lonesome wail of the train whistle as the

1 Wave Interference: Beats 2 Beats Previously we considered two interfering waves with the same . Now consider two different frequencies. When waves.

11: Wave Phenomena 11.2 The Doppler Effect. The Doppler Effect When a car passes you on the street, the frequency of its engine note appears to change.

Physics 101: Lecture 22, Pg 1 Physics 101: Lecture 22 Sound Today’s lecture will cover Textbook Chapter 12 EXAM III.

Doppler Effect David William D. Ecoben III-Archimedes.

Introducing Sound Waves David William D. Ecoben III-Archimedes.

The Doppler Effect Pg 503. Bell Ringer  What do you observe when an ambulance with a flashing siren comes towards you? Away from you? Why?

The Doppler Effect Textbook: 13.5 Homework: pg. 473 # 18, 19 pg. 476 # 64 – 71.

Today (Finish Chapter 13, Sound)  Temperature and Heat Concepts Tomorrow (Start Chapter 14)  Standing Waves  Beats  Doppler Effect  Example Problems.

Doppler Effect A Doppler effect is experienced whenever there is relative motion between a source of waves and an observer. A Doppler effect is experienced.

Doppler effect Eeeeeee – yowwwwwwwwww A change in frequency or pitch of a sound detected by an observer.

Doppler Effect Shift in frequency (high to low) due to the compression of light (or sound) waves in front of a moving object and the expansion of the light.

S : Source O : Observer V : velocity of the wave v O vovo S vsvs v vsvs v O vovo S v vsvs v vovo S v O DOPPLER EFFECT.

IP Moving wave sources Moving wave sources.

Doppler Effect The Doppler effect is the apparent change in the frequency of a wave motion when there is relative motion between the source of the waves.

Oscillations about Equilibrium

The Doppler Effect THE LAST LECTURE.

Doppler Effect & Shock Waves

Doppler Effect The apparent shift in frequency caused by the movement of the sound source or the movement of the observer. When the waves get crunched.

The Doppler Effect Elvis 8 (1963) Andy Warhol Vocabulary:

Purdue University, Physics 220

Doppler Effect.

Doppler Effect and Interference

Wave Interference: Beats

Doppler Effect and Red/blue Shift

Physics 101: Lecture 22 Sound

1. Doppler Effect Change in frequency of a wave due to relative motion between source and observer. A sound wave frequency change is noticed as a change.

"I love hearing that lonesome wail of the train whistle as the

Doppler effect Eeeeeee – yowwwwwwwwww

Harmonic Motion and Mechanical Waves

Purdue University, Physics 220

Doppler Effect (Ch. 12 Sec 12 7 p.338 – 342)

Doppler Effect Waves and Sound

11: Wave Phenomena 11.2 The Doppler Effect.

Take out your Mechanical Waves notes packet

LECTURE 9 Ch 16.7 BEATS Ch Doppler Effect

Key Areas covered The Doppler effect is observed in sound and light

The Doppler Effect.

Doppler effect Eeeeeee – yowwwwwwwwww

Doppler Effect.

Properties of Waves Part 2.

1 The Doppler shift explains

Wave Phenomena Topic 11.2 Doppler Effect.

"I love hearing that lonesome wail of the train whistle as the

Goal: To understand sound

Physics 101: Lecture 22 Sound

Presentation transcript:

Doppler Effect Doppler Effect – The apparent change in frequency of a wave due to the motion of the source and/or the observer Stationary Source – Moving Source – In front of source: Small wavelength, high freq. Behind source: Large wavelength, low freq.

Doppler Effect If you are moving toward the source, add vo If you are moving away from the source, subtract vo vo = velocity of observer fo = frequency observed (heard) fs = frequency of source v = velocity of sound (in air ≈ 343 m/s) vs = velocity of source If the sound source is moving toward you, subtract vs If the sound source is moving away from you, add vs

Example 5 The siren of a police car at rest emits a frequency of 1600.0 Hz. What frequency will you hear if you are at rest and the police car moves at 25.0 m/s… Toward you Away from you

Example 6 A siren from a police car has a frequency of 500.0 Hz and is moving with a velocity of 45.0 m/s. You are driving on the other side of the road towards the police car with a velocity of 36.0 m/s. What is the observed frequency from the police car? Assume the velocity of sound as 343 m/s.