ring of muscle that contracts and expands to change the amount of light that eye
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 near sighted? | is when you can see near by things clearly and distant objects appear clearly
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| what is the cornea? | transparent front of the surface of the eye
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| what is the iris? | ring of muscle that contracts and expands to change the amount of light that enters the eye
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| what is the pupil? | a hole through wich the light enters the eye
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| what is the retina? | layer of cells that line the inside of the eyeball
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| what are rods? | cells in the retina that distinguish black white and gray
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| what are cones? | cells in the retina that react to color
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| what is the optic nerve? | short, thick, nerve that carries signals to the rods and the cones to the brain
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| what is farsighted? | when you can see distant things clearly but nearby objects appear blury
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| what can concave lens do? | when a persons eyes are to long it can make a nearsighted persons eyes see more clearly.
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| what do convex lens do? | when a persons eyes balls are to short they may be farsighted and convex lens can help them see clearly
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| what are lens? | a crystalline structure located behind the irris, it focuses light on the retina
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| what is refraction? | when lgiht bends when it hits a new medium
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| what part of the eyes light refracts first REFRACTED by? | the cornea
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| how many times does lgith get refracted in your eye before hitting your retina? | 2
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| why is light bending? | changing in the speed form one medium to another
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| what can you give an example of using reflection? | water, glass
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| what kind of waves can be reflected? | all waves
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| what is difuse reflection? | when light hits it, it bounces in a bunch of directions
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| what is transmission? | when waves travel through a medium
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| sound waves are transmitted though______, _____, and ________ | soild, liquid and gasses
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| what electromagnetic wave is highest in energy? | gamma waves
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| how is radar used to determine the speed of objects? | through radio waves
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| what are the colors of the visible spectrum in order of increasing frequency? | red, orange, yellow, green
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| what kind of electromagnetic radiation can honeybees see but humans cant? | ultra violet (uv waves)
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| what is the electromagnetic spectrum? | a range of waves of all electromagnetic waves
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| what is mri and what is it used for? | magnetice?........
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| what is a thermogram? | it detects different tempatures and different colors
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| how can a person detect infrared waves without a(n) instrument? | feel them as heat
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| what is transparent and give and example of it? | you can see through glass
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| opague materials allow ________ to be transmitted through them? | no light
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| what are examples of opague materials? | humans, animals, and tv
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| Translucent materials transmit ______ light, but cause it to be ________ so no clear image is seen | some, scatter
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| absorbtion of certain frequenies of light occurs when the energy is ______ or ______ by the giving medium? | reflected, or transmitted
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| what happens when you wear a black t-shirt? what is happening to the visible light waves that are hitting it? | absorbing ll the colors of the spectrum
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| what happens to any objects or substances that absorb any wavelength of ekectromagnetic radiation? | turns into heat
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| true or false? mechanical waves transfer energy through a vacum? | false, because its transfers through a medium(:
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| true or false? a wave is a dusturbance that transfer energy? | true
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| true or false? most fm waves are invisible and detectable? | true
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| too mmuch exposure to ultraviolet radiation can lead to? | sunburn, skin cancer, possible death.
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| what type of visible light has the shortest wavelength? | violet
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| how a light bends when it enters a new medium at an angle is a ______________? | refraction
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| how a light bounces back when it hits a barrier is a ____________? | reflection
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| the type of wave visible light is? | electromagnetic
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| when wvaes are refracted they are ? | changed in speed
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| one application of infrared radiation is for? | night vision cameras
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| what is the longest wavelength that has the shortest frequency? | radio wave
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| what wave length uses energy as heat and you can feel this wavelength? | infrared wave
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| what are the 7 visible lights? | red, orange, yellow, green, blue, indigo, and violet
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| what is another way of say the 7 visible lights? | roy g biv
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| what color is the longest? | red
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| what color is the shortest? | violet
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| when does a rainbow occur? | when visible light enters a new medium water in our atmosphere
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| what wave has the shorter wave and the highest frequenc? | x-ray waves
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| what wave can cause to much exposure can cause skin cancer? | x-ray waves
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| wich waves are harmful? | x-ray and gamma waves
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| what waves arent harmful? | radio micro and infrared and uv waves
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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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