optics stack
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| what is visible light is... | a mixture of all the coulors of the rainbow
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| what does a prism do? | it refracts light, seperating the colors
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| what can a second prism do? | it can recombine the colors to form white light
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| what is refraction? | it is the bending or changing derection of a wave asit passes from one material to another
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| what is reflection? | it occurs when a light wave strickes an object and bounces off
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| what happens when sun light strikes colored clothing? | some colors are reflected while other colors are absorbed
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| which colors can be seen? | the reflected ones
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| why does a red shirt look black in a dark room? | because the shirt does not produce its own light
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| what are the two kinds of sun screens? | physical sunscreen and cemical sunscreen
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| what is the diffrence between the two kinds of sunscreen? | physical sunscreen reflects the UV rays while cemical sunscreen absorbs it
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| what are microwaves? | microwaves have the shortest wavelength and highest frequentcy of all the radio waves.
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| what are microwaves used for? | for telecommunications because they can be transmitted into space. also (as you can tell in the name) it is used for micro waves becuse it make water molicules move
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| what are ultraviolet waves? | they are a kind of electromagnetic radiation that, relitive to light, has a shorter wavelengh and higher energy and frequentcy. when it strikes your skin it enables your body to make vitamin D, which you need for healthy bones and teeth but causes sunburn
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| what are gamma rays? | they are the highest energy and frequentcy and shortest wavelength portion of the electromagnetic spectrum. they result from nuclear reactions and are produced by the hottest regions of the universe. focused bursts of gamma rays are used radiation therapy
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
maxdabbs
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