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Mr. Belyea

Astronomy Lesson 3

spectroscope an instrument that separates light into a pattern of lines of different colors
how do astronomers study objects in space by observing the light and other forms of radiation they give off
what do the tools do record, focus,magnify and analyze the light and other radiation
what does it mean to analyze something to separate it into its parts so it can be studied
what does a prism do it separates white light or sunlight into a rainbow spectrum, or pattern of colors
how can a spectroscope analyze light from a glowing star it can separate the light into bands or patterns of light
what does each element in the star have its own pattern
why do astronomers study the light patterns of a star to find out what elements a star contains
what do telescopes do make distant objects look clearer and show detail
how do telescopes make distant objects look clearer mirrors and lenses in telescopes bend and focus light to produce an image with more detail
what does a lens do magnify objects
what does the lens in your eye do focuses light and produces an image
refraction the bending of light as it passes from one material to another, a way to gather and focus light
reflection the bouncing of light off a surface, a way to gather and focus light
what are two ways to gather and focus light refraction and reflection
how does a lens work by refraction or bending the light as it passes from one material to another
how the light bends as it passes through the lens depend on the shape of the lens
how do mirrors work by reflection or bouncing light off a surface
what does changing the shape of a mirror do changes the direction of light that bounces off it
how do optical telescopes work the produce images by focusing light rays, refraction or reflection
what were one of the first important discoveries made with a refracting telescope that there are craters on the moon
what problem did the reflecting telescope solve blurred images with the refracting telescope
what kinds of radiation do stars give off visible light waves and radiation that cannot be seen by the human eye
why cant the radiation be seen by the human eye the wavelengths are shorter of linger than visible light, they are too short or too long for the eye to detect
what can scientist use to see radiation that cant be seen by the human eye radio telescope, satellites in space
what do the radio telescopes and satellites in space do collect and make images from these invisible kinds of radiation
radiotelescope collect and measures the radio waves that objects in space give off, can see dust clouds in dark parts of the sky
infrared rays have longer wavelengths that visible light
infrared telescope collects infrared rays from objects in space, has an infrared detector instead of eyepiece
how do astronomers record images from optical telescopes they use film or photographic plates
how does film collect images it can be exposed for a long time, so it can collect enough light to make dim objects appear bright.
electronic detectors used with telescopes-record images from space, they collect light or other rays and change their radiation pattern into a pattern of electrical charges and shown as picture on computer screen. different wavelengths of radiation appear as different colors
what are telescopes in space attached to rockets or satellites
what is the advantage telescopes in space have over telescopes on Earth they can record the light and radiation from objects in space without the radiation passing through the Earths atmosphere
why do telescopes on Earth take blurry images because as the light passes through the earth atmosphere it contains many particles including water vapor, dust, carbon dioxide.
what else will affect the way light moves through air temperature of the air will keep a lens from focusing clearly
why do infrared telescopes have to be cooled in cold of space when studying infrared rays in space, heat absorbed by the telescope can affect the image
what blocks infrared rays in the earths atmosphere carbon dioxide and water vapor
where are infrared rays placed to avoid blurry images very high mountains or satellites
concave makes light rays spread apart
convex brings light rays together
Created by: mloft