Standing Waves & Doppler

Front

What is a standing wave?

Back

A standing wave is a wave that remains in a constant position, characterized by nodes (points of no displacement) and antinodes (points of maximum displacement).

Front

Define node in the context of standing waves.

Back

A node is a point along a standing wave where the wave has minimal or zero amplitude, meaning there is no movement at that point.

Front

Define antinode in the context of standing waves.

Back

An antinode is a point along a standing wave where the wave has maximum amplitude, resulting in the greatest displacement.

Front

What is the formula for calculating the frequency of a wave?

Back

Frequency (f) can be calculated using the formula: f = v / λ, where v is the wave speed and λ (lambda) is the wavelength.

Front

How do you determine the wavelength of a wave in a pipe open at both ends?

Back

The wavelength (λ) in a pipe open at both ends is given by λ = 2L/n, where L is the length of the pipe and n is the harmonic number.

Front

What is the speed of a wave on a string?

Back

The speed of a wave on a string can be calculated using the formula: v = f × λ, where f is the frequency and λ is the wavelength.

Front

What does a blue shift in light indicate about an object in space?

Back

A blue shift indicates that the object, such as a star, is moving towards the observer, resulting in a decrease in wavelength.

Front

What is the first harmonic of a string fixed at both ends?

Back

The first harmonic (fundamental frequency) is the lowest frequency at which a string vibrates, with one antinode in the center and nodes at both ends.

Front

How do you calculate the frequency of a tone produced by a pipe?

Back

To calculate the frequency, first find the wavelength using the formula λ = 2L/n, then use f = v / λ, where v is the speed of sound.

Front

What is the relationship between frequency and wavelength?

Back

Frequency and wavelength are inversely related; as frequency increases, wavelength decreases, and vice versa.