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Tuesday, December 15

  1. page Electromagnetic Spectrum & Light edited <bold HI> {80GBNK1313311062.gif} HI The Electromagnetic Spectrum consists of 7 elect…

    <bold HI>
    {80GBNK1313311062.gif}
    HI
    The Electromagnetic Spectrum consists of 7 electromagnetic waves that together, create the Electromagnetic Spectrum. These are Gamma Rays, X-rays, Ultraviolet, Visible Light, Infrared, radio waves and Microwaves. Waves on the left of the Electromagnetic spectrum have the shortest wavelengths, and are therefore more damaging, whereas waves on the right of the Electromagnetic Spectrum have the longest wavelengths, and are less damaging.
    Most of these waves are used in everyday life, waves such as X-rays are used to take pictures of peoples bones, visible light is used to see, infrared is used to heat objects, and is applied in ovens and Microwaves and Radio waves are used in things such as radios and microwave ovens. The only wave not commonly applied to everyday life is Gamma Rays, as they are damaging to living cells and can kill people.
    Gamma Rays- Gamma Rays have the shortest wavelength and are the most damaging to living cells. They have the ability to pass through the human skin. Gamma Rays can damage cells and kill people, and are only used in experiments to split materials and look at them in more detail.
    (view changes)
  2. page Electromagnetic Spectrum & Light edited {80GBNK1313311062.gif} All parts of the spectrum HI The Electromagnetic Spectrum consists o…

    {80GBNK1313311062.gif}
    All parts of the spectrumHI
    The Electromagnetic Spectrum consists of 7 electromagnetic waves that together, create the Electromagnetic Spectrum. These are Gamma Rays, X-rays, Ultraviolet, Visible Light, Infrared, radio waves and Microwaves. Waves on the left of the Electromagnetic spectrum have the shortest wavelengths, and are therefore more damaging, whereas waves on the right of the Electromagnetic Spectrum have the longest wavelengths, and are less damaging.
    Most of these waves are used in everyday life, waves such as X-rays are used to take pictures of peoples bones, visible light is used to see, infrared is used to heat objects, and is applied in ovens and Microwaves and Radio waves are used in things such as radios and microwave ovens. The only wave not commonly applied to everyday life is Gamma Rays, as they are damaging to living cells and can kill people.
    ...
    E-M Trends
    The Electromagnetic Spectrum has many trends that make it unique. One of these is the fact that the wavelengths get shorter from the right to the left of the spectrum. When these wavelengths get shorter, the corresponding electromagnetic wave gets more damaging. These trends can be seen in everyday life, with gamma rays damaging living cells when in contact with them, whilst on the other side of the spectrum, the microwaves or radiowaves are completely harmless.
    Wavelength,Wavelength, energy and
    Wavelength, energy and frequency trends apply to the fact that all are related physically, and mathematically. Different waves can be described in different ways due to the way they emit their frequency, energy or wavelength. For example radio waves would usually be described with a frequency, as radio towers emit radio waves at different frequencies. X-rays would be described as energy, as they emit energy that can damage human cells. Finally, microwaves would be described with wavelength. This happens because it is easier to measure the parts of the spectrum in certain units. Frequency being hertz, wavelengths metres and energy, when describing light, as electron volts, or eV.
    The light Spectrum and Trends
    (view changes)

Sunday, September 4

  1. page Sound edited {Sound.gif} Speed of sound ... which states {Screen_shot_2011-09-03_at_9.04.07_PM.png} th…
    {Sound.gif} Speed of sound
    ...
    which states
    {Screen_shot_2011-09-03_at_9.04.07_PM.png}
    that particles in a gas aren't packed together, and move freely, this makes it harder for the sound to move between the particles in a gas. The speed of sound is also dependant on the temperature of the medium, the hotter the medium, the faster the sound moves. This is because, according the particle theory, particles move faster when heated, and therefore, carry the sound faster and further. The speed of sound can be broken is very special circumstances. If a fighter jet or whip can pass the sound barrier of 330m/s, a sonic boom occurs. A sonic boom occurs when air is displaced by the object, this air has to escape quickly, and is seen as a sonic boom. A object moving faster than the speed of sound is said to be moving at supersonic speed.
    (view changes)
    2:27 am
  2. page The Eye and Ear edited {The_Eye_and_Ears.gif} Th The Eye Functions Cornea-The cornea is a tissue that covers the ey…
    {The_Eye_and_Ears.gif} Th
    The Eye Functions
    Cornea-The cornea is a tissue that covers the eye. It is clear and dome shaped. The cornea helps focus light, and also lets light into the eye.Eyebrow-The eyebrow is a thick bit of hair above the eye and on the brow. It serves to keep liquid out of the eye, such as sweat and rain.Eyelash-The eyelash is located on the tips of the eyelids, on the tops and bottoms. It also serves to keep liquid, dust, and even small insects out of the eyes.Eyelid-The eyelid is a fold of skin that protects the eye from damage. It also has oils in it that help lubricate the eye, and the eyelid also keeps the eye lubricated during sleep.Iris-The coloured part of the eye. The iris controls how much light enters the eye by changing the size of the pupil. The iris makes the hole smaller in accordance with the amount of light; the more there is, the smaller it is.Lens-The lens gets smaller and larger depending on the amount of light, it helps focus light. People with eye defects can be myopic and hyper myopic, these are things that affect the eye, the former near sighted, and the latter far sighted.Optic Nerve-The optic nerve is the nerve that transmits impulses from the retina to the brain. It transmits these images backwards, but the brain flips it right side up.Pupil-The pupil is an opening in the centre of the iris, it will change size depending on the amount of light.Retina-The retina is one of the most important parts of the eye. It is the receptor that takes light rays and converts them into electrical impulses. These then get sent to the brain via the optic nerve.Tear-The tear is a clear liquid that is produced by glands in the eyes. It helps clean out the eyes.
    {eye.png}
    The Ear Functions
    ...
    auditory canal is partispart of the
    Middle EarThe middle ear is the passage of travel for the vibrations from the outer ear to the inner ear. The middle ear consists of the hammer, stirrup, anvil and Eustachian Tube.Hammer- The hammer is one of the ossicles in the ear. There is 3 of these, and the hammer is the first. The hammer moves in a swinging motion when hit with vibrations, and moves the anvilAnvil- The anvil is another one of the ossicles in the ear. It also moves in the swinging motion, that was initiated by the ear drum, and started by the hammer.Stirrup- The stirrup is the final ossicle, but instead of just vibrating, it passes on the vibration started by the other parts of the ear before it, and passes it on to the oval window.Eustachian Tube- The eustachian tube is located at the bottom of the ear, and is responsible for releasing pressure in the ear.
    Inner Ear- The inner ear regulates both hearing and balance, and contains some of the most important parts of the ear. The Oval window is just that, a window or passageway from the middle to inner ear, the semicircular canals maintain balance through the fluids in them that maintain balance, the cochlea performs the most important job in the brain, transforming the transferred vibrations into electrical impulses that the auditory nerve will take to the brain. Once this happens, the hearing process is complete.
    (view changes)
    2:24 am
  3. page The Eye and Ear edited {The_Eye_and_Ears.gif} Th The Eye Functions Cornea-The cornea is a tissue that covers the ey…
    {The_Eye_and_Ears.gif} Th
    The Eye Functions
    Cornea-The cornea is a tissue that covers the eye. It is clear and dome shaped. The cornea helps focus light, and also lets light into the eye.Eyebrow-The eyebrow is a thick bit of hair above the eye and on the brow. It serves to keep liquid out of the eye, such as sweat and rain.Eyelash-The eyelash is located on the tips of the eyelids, on the tops and bottoms. It also serves to keep liquid, dust, and even small insects out of the eyes.Eyelid-The eyelid is a fold of skin that protects the eye from damage. It also has oils in it that help lubricate the eye, and the eyelid also keeps the eye lubricated during sleep.Iris-The coloured part of the eye. The iris controls how much light enters the eye by changing the size of the pupil. The iris makes the hole smaller in accordance with the amount of light; the more there is, the smaller it is.Lens-The lens gets smaller and larger depending on the amount of light, it helps focus light. People with eye defects can be myopic and hyper myopic, these are things that affect the eye, the former near sighted, and the latter far sighted.Optic Nerve-The optic nerve is the nerve that transmits impulses from the retina to the brain. It transmits these images backwards, but the brain flips it right side up.Pupil-The pupil is an opening in the centre of the iris, it will change size depending on the amount of light.Retina-The retina is one of the most important parts of the eye. It is the receptor that takes light rays and converts them into electrical impulses. These then get sent to the brain via the optic nerve.Tear-The tear is a clear liquid that is produced by glands in the eyes. It helps clean out the eyes.
    {eye.png}
    The Ear Functions
    Outer EarThe outer ear is the visible part of the ear. It contains 3 parts, the Pinna, Auditory Canal and Ear Drum. These serve to transmit the sound waves to the middle ear.Pinna- The pinna is the part of the ear that amplifies and catches sound waves. The pinna then sends these to the auditory canalAuditory Canal- The auditory canal is part of the ear that transmits these sounds to the eardrum, and starts the process of hearing.Eardrum- The eardrum vibrates when it is hit with sound waves, and subsequently starts the motion of vibration reactions that take hold in the middle ear.
    Middle EarThe middle ear is the passage of travel for the vibrations from the outer ear to the inner ear. The middle ear consists of the hammer, stirrup, anvil and Eustachian Tube.Hammer- The hammer is one of the ossicles in the ear. There is 3 of these, and the hammer is the first. The hammer moves in a swinging motion when hit with vibrations, and moves the anvilAnvil- The anvil is another one of the ossicles in the ear. It also moves in the swinging motion, that was initiated by the ear drum, and started by the hammer.Stirrup- The stirrup is the final ossicle, but instead of just vibrating, it passes on the vibration started by the other parts of the ear before it, and passes it on to the oval window.Eustachian Tube- The eustachian tube is located at the bottom of the ear, and is responsible for releasing pressure in the ear.
    Inner Ear- The inner ear regulates both hearing and balance, and contains some of the most important parts of the ear. The Oval window is just that, a window or passageway from the middle to inner ear, the semicircular canals maintain balance through the fluids in them that maintain balance, the cochlea performs the most important job in the brain, transforming the transferred vibrations into electrical impulses that the auditory nerve will take to the brain. Once this happens, the hearing process is complete.
    {Screen_shot_2011-08-19_at_3.00.02_PM.png}

    To see how some of this relates to real life, go to Real World Example Video!!!!!!!
    <- Previous "Wave Interactions"Back to Home"Sound" Next ->
    (view changes)
    2:24 am

Saturday, September 3

  1. page The Eye and Ear edited ... Cornea-The cornea is a tissue that covers the eye. It is clear and dome shaped. The cornea hel…
    ...
    Cornea-The cornea is a tissue that covers the eye. It is clear and dome shaped. The cornea helps focus light, and also lets light into the eye.Eyebrow-The eyebrow is a thick bit of hair above the eye and on the brow. It serves to keep liquid out of the eye, such as sweat and rain.Eyelash-The eyelash is located on the tips of the eyelids, on the tops and bottoms. It also serves to keep liquid, dust, and even small insects out of the eyes.Eyelid-The eyelid is a fold of skin that protects the eye from damage. It also has oils in it that help lubricate the eye, and the eyelid also keeps the eye lubricated during sleep.Iris-The coloured part of the eye. The iris controls how much light enters the eye by changing the size of the pupil. The iris makes the hole smaller in accordance with the amount of light; the more there is, the smaller it is.Lens-The lens gets smaller and larger depending on the amount of light, it helps focus light. People with eye defects can be myopic and hyper myopic, these are things that affect the eye, the former near sighted, and the latter far sighted.Optic Nerve-The optic nerve is the nerve that transmits impulses from the retina to the brain. It transmits these images backwards, but the brain flips it right side up.Pupil-The pupil is an opening in the centre of the iris, it will change size depending on the amount of light.Retina-The retina is one of the most important parts of the eye. It is the receptor that takes light rays and converts them into electrical impulses. These then get sent to the brain via the optic nerve.Tear-The tear is a clear liquid that is produced by glands in the eyes. It helps clean out the eyes.
    {eye.png}
    The Ear Functions
    To see how some of this relates to real life, go to Real World Example Video!!!!!!!
    <- Previous "Wave Interactions"Back to Home"Sound" Next ->
    (view changes)
    11:18 pm
  2. page Properties of Waves edited ... The Relationship Between Waves and Energy Waves are a medium to transfer energy from one plac…
    ...
    The Relationship Between Waves and Energy
    Waves are a medium to transfer energy from one place to another. Waves send sound waves from the vocal cords to the pinna of another persons eardrum for example. Waves influence other energy, for example, To read more about this, go to The Eye and Ear.
    To see how some of this relates to real life, go to Real World Example Video!!!!!!!
    <- Previous "Types of Waves"Back to Home Page "Electromagnetic Spectrum and Light" Next ->
    (view changes)
    11:03 pm
  3. page Types of Waves edited ... {http://images.nationalgeographic.com/wpf/media-live/photos/000/002/cache/lightning-over-water…
    ...
    {http://images.nationalgeographic.com/wpf/media-live/photos/000/002/cache/lightning-over-water_270_600x450.jpg}
    http://images.nationalgeographic.com/wpf/media-live/photos/000/002/cache/lightning-over-water_270_600x450.jpg
    To see how some of this relates to real life, go to Real World Example Video!!!!!!!
    <- Previous "General InfoBack to Home"Properties of Waves" Next ->
    (view changes)
    11:02 pm

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