communication and their uses
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 does EM stand for? | electromagnetic
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| what are the EM waves from lowest frequency to highest frequency? Rabbits Meet In Very Unusual eXpensive Gardens | radio waves, microwaves, infra-red, visible light, ultraviolet, x-rays, gamma rays
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| what are microwaves used for? | satellite communication and mobile phones
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| what are infra-red waves used for? | remote controls and optical fibres (used over phone lines)
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| what is visible light used for? | photography
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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.
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.
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:
rv1
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