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18 Cards in this Set
- Front
- Back
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Q
vocab: constellations |
A
Patterns of stars in the sky. |
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Q
vocab: electromagnetic radiation |
A
Energy that can travel directly through space in the form of waves. |
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Q
vocab: visible light |
A
Light you can see. |
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Q
vocab: wavelength |
A
The distance between the crest of one wave and the crest of the next wave. |
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Q
vocab: spectrum |
A
The range of different colors in white light. |
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Q
What kind of waves does the electromagnetic spectrum contain? |
A
Radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. |
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Q
What do astronomers use to detect various types of electromagnetic radiation? |
A
Most types of telescopes collect and focus different types of electromagnet radiation. |
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Q
What kind of telescope uses CONVEX lens to gather a large amount of light and focus focus it into a small area? |
A
a refracting telescope |
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Q
What type of telescope uses concave mirrors to gather a large amount of light and focus it onto a small area. |
A
a reflecting telescope |
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Q
What do radio telescopes do? |
A
They detect radio waves from objects in space. |
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What is an observatory?
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A
A building that contains one or more telescopes. |
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Q
What does a spectrograph do? |
JA
It breaks the light from an object into colors and photographs the resulting spectrum. |
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Q
For what do astronomers use spectrographs? |
A
They are used to get information about stars, including their chemical compositions and temperatures. |
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Q
For what do astronomers use line spectrums? |
A
They use them to find the temperature of stars. |
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Q
How does a line spectrum allow astronomers to find the temperature of a star? |
A
Line spectrums show lines caused by the absorbtion of light by elements. Each element has a unique line pattern which is strongest at a specific temperature. |
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Q
What is another name for the star Polaris? |
A
The North Star. |
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Q
What do telescopes collect and focus? |
A
They collect and focus visible light. |
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Q
What type of modern telescopes are the largest? |
A
Reflecting telescopes are now the largest telescopes used. |
