Light
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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| Pythagoras | Greek philosopher who thought light was made of beams of particles
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| Zaccharias and Hans Janssen | Dutch scientists who created the first compound (more than one lens) light microscope
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| Galileo | Made his own lenses, which he used to build a telescope, and tried to measure the speed of light with lanterns
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| Young and Augustin | English scientists that proved light behaves like a wave
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| Energy | The capacity to apply a force over a distance
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| Force | A push or pull on an object
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| Crest | The highest point in a wave
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| Trough | The lowest point in a wave
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| Wavelength | The distance from crest to crest or trough to trough of a wave.
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| Amplitude | The height of a wave crest or depth of a wave trough
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| Frequency | The number of cycles per second of a wave
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| Hertz | The unit used to measure frequency
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| Transverse wave | When a wave moves up and down
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| Compression wave | The wave moves back and forth in the same direction (scrunches up and stretches out)
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| Wave model of light | Light is a type of wave that travels through empty space and transfers energy from one place to another.
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| Visible light | Waves of light that you can see
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| Refraction | The bending or changing direction of a wave of light
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| Spectrum | The range of colours or frequencies of visible light
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| Reflection | When a light wave strikes an object and bounces off
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| Radiant energy | Energy, like light, that travels by radiation
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| Electromagnetic radiation | The transmission of energy in the form of waves that extend from the longest radio waves to the shortest gamma rays.
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| Radio waves | A type of electromagnetic radiation that has the lowest energy and the longest wavelength. Can be used for radio and TV broadcasting.
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| Microwaves | Waves that have the shortest wavelength and highest frequency of all the radio waves. Can be used to cook food as well as send information to space and back.
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| Infrared waves | A type of electromagnetic radiation that, relative to light, has a longer wavelength and lower energy and frequency. Can be used in remote controls and thermal images.
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| Ultraviolet waves | A type of electromagnetic radiation that, relative to light, has a shorter wavelength, and higher energy & frequency. Can give sunburns, and can be used in solving crimes.
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| X-Rays | Have much shorter wavelength and higher energy and frequency than UV waves. Can be used to photograph teeth and bones.
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| Gamma rays | Have the highest energy and frequency, and the shortest wavelength portion of the electromagnetic spectrum. Can be used to kill cancer cells.
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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.
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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:
mrmcquaid
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