Term
| WHAT IS A REFLECTING TELESCOPE? |
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Definition
~uses lens to gather and focus light
~has an objective lens that that bends light that passes through it and focuses the light so it can then be magnified by an eyepiece |
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Term
| HOW DOES A REFRACTING TELESCOPE WORKS? |
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Definition
| ~1st: lenses focus different colors of light at slightly different distances, so images cannot be perfectly focused |
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Term
| HOW IS A REFRACTING TELESCOPE LIMITED? |
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Definition
| It is limited because of the size of the objective lens. If the lens is too large, the glass sags under its own weight and images are disorted. This is why most astronomers use a reflecting telescopes. |
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Term
| WHAT IS A REFLECTING TELESCOPE? |
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Definition
| ~a telescope that uses a curved mirror to gather and focus light |
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Term
| HOW DOES A REFLECTING TELESCOPE WORK? |
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Definition
| First, light enters the telescope and is reflected from a large, curved mirror to a flat mirror. The flat mirror focuses the image and reflects the light to be magnified by the eyepiece. |
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Term
WHAT IS AN ADVANTAGE OF A REFLECTING TELESCOPE?
HINT: there are three
(this is a long one!) |
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Definition
| One advantage is that the mirror can be very big. Large mirrors allow reflecting telescopes to gather more light than refrcting telescopes. Another advantage is that curved mirrors are polished on their curved side, so flaws in the glass do not affect the light. The last advantage is that mirrors can focus all colors of light to the same focal point. Therefore, reflecting telescopes allow all colors of light from an object to be seen in focus at the same time. |
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Term
| WHAT IS THE DEFINITION OF A TELESCOPE? |
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Definition
| An instrument that gathers electromagnetic radiation from objects in space and concentrates it for better observation. |
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Term
| WHAT IS THE ELECTOMAGNETIC SPECTRUM? |
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Definition
| An electromagnetic spectrum is made up of all the wavelengths of the electromagnetic radiation. |
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Term
| Name the electromagnetic stuff in order from longest wavelength to shortest. |
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Definition
| Radio Waves, Microwaves, Infared, Visible, Ultra-Violet, X rays, and Gamma Rays |
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