Which of the following regions of the electromagnetic spectrum has the longest wavelength?

Which of the following regions of the electromagnetic spectrum have the highest frequency?

Which of the following statements are true?

Which statement below best describes why astronomers study the electromagnetic spectrum?

The apparent shift in wavelength of light or sound emitted by an object when viewed by an observer is know as:

The apparent shift of visible light to longer wavelengths observed in distant galaxies is known as:

Explains that all galaxies are moving away and that further galaxies are moving faster than nearer galaxies

The range of electromagnetic spectrum from approximately 400 nm-700 nm

Astronomers use hydrogen gas to determine the rate of speed of distant galaxies. The expected baseline peak for hydrogen-alpha is 660 nm.  Scientists observe a galaxy where the hydrogen alpha is at 700 nm.  The speed of light is 299,800,000 m/s.  Which of the following is approximately the speed of the galaxy?

As wavelength increases

Older stars emit most radiation in the