Chapter 23 Flashcard

Front

What was the first space telescope built by NASA?

Back

Hubble Space Telescope

Front

What are the particles called that light is made of, which can exert pressure on matter?

Back

Photons

Front

What is the term for the change in wavelength that occurs when an object moves toward or away from a source?

Back

Doppler Effect

Front

What is the study of light based on wavelength called?

Back

Spectroscopy

Front

Who was the first scientist to use a telescope for astronomical observations?

Back

Galileo

Front

What is the primary function of a telescope?

Back

To collect and magnify light from distant objects.

Front

What is the difference between a refracting telescope and a reflecting telescope?

Back

A refracting telescope uses lenses to bend light, while a reflecting telescope uses mirrors to reflect light.

Front

What is the significance of the Hubble Space Telescope in astronomy?

Back

It has provided deep space images and data that have greatly advanced our understanding of the universe.

Front

What is the principle behind spectroscopy?

Back

It involves analyzing the light spectrum emitted or absorbed by materials to determine their composition.

Front

What does the term 'redshift' refer to in astronomy?

Back

It refers to the increase in wavelength (shift to red) of light from an object moving away from the observer.