Space Technology & The Doppler Effect

Front

What is the Doppler Effect?

Back

The Doppler Effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.

Front

What happens to the light from a star that is moving towards Earth?

Back

The light shifts towards the blue side of the electromagnetic spectrum.

Front

What type of telescope is used to observe radio waves from space?

Back

A radio telescope.

Front

What is wavelength?

Back

Wavelength is the distance between successive crests of a wave.

Front

What is one advantage of space-based telescopes?

Back

Their images are not distorted by Earth's atmosphere.

Front

What does Cosmic Microwave Background Radiation represent?

Back

It represents traces of radiation left over from the Big Bang.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light, radio waves, and X-rays.

Front

What is a light year?

Back

A light year is the distance that light travels in one year, approximately 5.88 trillion miles.

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object moving away from the observer shifts towards the red end of the spectrum.

Front

What is a space probe?

Back

A space probe is an unmanned spacecraft that travels out of Earth's orbit to collect data about space.