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