Understanding the Speed of Galaxies Through Wavelength Shifts

The video tutorial explains the relationship between the shift in wavelength of light emitted by galaxies and their velocity. It covers the concepts of redshift and blueshift, detailing how these phenomena occur when galaxies move relative to Earth. The tutorial introduces an equation that relates wavelength shift to galaxy velocity and demonstrates its application through examples. The first example calculates the shift in wavelength for a galaxy moving away from Earth, while the second example determines the speed of a galaxy using absorption spectra. The video concludes by emphasizing the significance of redshift and blueshift in understanding galaxy movement.

What is the relationship between the shift in wavelength of light emitted by a galaxy and its velocity?

Explain the concept of redshift and blueshift in the context of galaxies.

How does the observed wavelength of light change when a galaxy is moving away from us?

What is the significance of the reference wavelength (Lambda subscript 0) in the calculations?

What does a positive recessional velocity indicate about a galaxy's movement?

Describe how to calculate the shift in wavelength using the given equation.

How can absorption spectra be used to determine the velocity of a galaxy?