Doppler Effect in Wave Propagation

Play an AI-generated podcast conversation about this lesson

What is the Doppler effect a result of?

The change in amplitude due to the wave's speed
The change in wavelength due to the medium
The change in frequency due to the wave's velocity
The relative motion between the source and receiver (correct)

What happens to the wavelength in the direction of the source's motion?

It decreases (correct)
It remains the same
It increases
It becomes zero

What is the effect on the frequency of the wave due to the Doppler effect?

It becomes zero
It remains the same
It decreases
It increases (correct)

What is the Doppler effect used for in radar technology?

To calculate the velocity of an object (A) Signup and view all the answers

What is true about the Doppler effect in terms of the motion of the source and listener?

It occurs regardless of whether the source or listener is moving (D) Signup and view all the answers

What is the relationship between the frequency and wavelength of a wave?

v = fλ (B) Signup and view all the answers

What is the minimum speed required for a source to create a sonic boom?

Faster than the speed of sound (B) Signup and view all the answers

What is the primary use of Doppler radar in weather forecasting?

Detecting tornado formation (B) Signup and view all the answers

What is the primary function of Doppler echocardiogram?

Indicating the direction of blood flow (D) Signup and view all the answers

What is the term used to visualize velocities of moving tissues?

Doppler imaging (B) Signup and view all the answers

What is the frequency range of ultrasound waves?

Above 20KHz (D) Signup and view all the answers

What is the primary application of ultrasound in medicine?

Using sound waves to look inside the human body (B) Signup and view all the answers

What type of ultrasound imaging provides one-dimensional information?

A-Mode (C) Signup and view all the answers

What is the primary use of B-Mode in ultrasound imaging?

Measuring cardiac chambers dimensions (A) Signup and view all the answers

What is the characteristic of laminar flow in blood vessels?

Layers of flow with slowest flow at the wall (D) Signup and view all the answers

What is M-Mode ultrasound imaging used for?

Recording video-like movements (B) Signup and view all the answers

What type of Doppler ultrasound is used to measure blood flow?

Continuous wave Doppler (B) Signup and view all the answers

What is the primary application of A-Mode in ultrasound imaging?

Echoencephalography and echocardiography (D) Signup and view all the answers

What is the primary difference between continuous wave Doppler and pulsed wave Doppler?

The type of crystal used to send and receive the signal (A) Signup and view all the answers

What is the advantage of power Doppler over color Doppler?

It is more sensitive in detecting blood flow (B) Signup and view all the answers

What type of Doppler is used for general assessment of flow in the region of interest?

Color Doppler (B) Signup and view all the answers

What is the purpose of the color display in color Doppler?

To display the direction and velocity of flow (D) Signup and view all the answers

What is the difference between the flow depicted in red and blue in color Doppler?

The direction of flow (B) Signup and view all the answers

What technique is used in pulsed wave Doppler to generate an image?

Pulse-echo technique (D) Signup and view all the answers

What is the wavelength of the fundamental frequency on a fixed string?

Twice the length of the string (D) Signup and view all the answers

What is the main reason why different strings have different fundamental frequencies?

They have different lengths and/or linear densities (D) Signup and view all the answers

How do guitar strings differ from each other?

They differ in linear density (C) Signup and view all the answers

What is the characteristic shape of a grand piano's sound box due to?

The variation in string density and length (D) Signup and view all the answers

How are individual strings tuned to the exact desired frequencies?

By changing the tension of the string (A) Signup and view all the answers

Why are musical instruments designed to have small variations in tension between strings?

To prevent warping and other damage (A) Signup and view all the answers