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32 Cards in this Set
- Front
- Back
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lens
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light is focused onto the retina |
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cornea |
focuses light and protects the eye |
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Iris |
controls the amount of light entering the eye |
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ciliary muscle |
where light enters the eye |
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retina |
where light is focused and detected |
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optic nerve |
carry information to the brain |
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lateral inversion? |
right is left etc in a mirror |
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REFRACTION |
The path of the ray is bent inside the glass because it is denser than air but when the light comes back it onto the air it goes back to the original shape. The speed of light changes depending on the density of the material it is travelling through. |
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Prism splitting light- DISPERSION |
A prism splits a ray of white light into the colours of the rainbow. This is called DISPERSION |
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White light? |
THE SPECTRUM |
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light refracts the slowest: |
red light |
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light refracts the fastest: |
violet light |
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red+blue |
magenta |
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blue+green |
cyan |
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red+green |
yellow |
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red+blue+green |
white light |
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RAINBOW... |
water droplets in the air the sun illuminates them from behind, you may see a rainbow. light enters the water droplets and refracts. it then reflects off the back of the rain drop. Red light refracts the least and violet the most. This causes dispersion of the sunlight. When the spectrum made by the first prism passes through a second prism, the colours are recombined to make light again. |
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pitch= |
frequency |
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volume= |
amplitude |
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what do you see this on… os.. |
oscilloscope |
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Sound travels fastest through.. |
solids |
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why does sound travel fastest through a solid? |
particles are closer together, this means they can vibrate more easily and are more easily passed from particle to particle. |
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older people cannot hear a ______ frequency |
higher |
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what is temporary hearing loss? |
hearing loss that may be caused by ear infections and colds after which hearing recovers. |
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what is permanent hearing loss? |
hearing loss and deafness can be present at birth or occur if the ear is damaged or diseased. |
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hearing range of the average person: |
20hz - 20,000hz |
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if a solid is heated its temperature rises until it reaches the ________ |
melting point |
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at the melting point the temperature stops _____ while the solids melt because the energy goes into ___________ the ________. |
rising, separating, particles |
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once all the solid has _____ the temperature _______ again until it reaches the ______ _______. |
melted, rises, boiling point |
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at the _____ _______ the temperature again stays the ______ as the energy ________ the particles again. |
boiling point, same, separating |
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the ________ of a substance depends on how far apart the particles are. |
density |
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air is least dense and rises tot he top, water is denser so sinks to the bottom. this is important in explaining __________ |
convection |
