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Created with Fabric.js 1.4.5 Sound vs Light ~travels in longitudinal waves ~frequency determines the pitch of sound; the pitch of a sound wave depends on how fast the particles of a material vibrate.~the amplitude of the wave determines its volume~tone is the measure used to determine the quality~sound requires a medium to be transmitted, travels faster in a high medium; a solid~cannot travel through a vacuum, but requires a medium such as a solid, liquid or gas Characteristics of Sound ~electromagnetic waves- waves that transmit energy from vibrating electrical charges. such as electrons, they are transferred across through electric and magnetic fields~can be transmitted through a vacuum; a space free of particles- outer-space~these waves don't depend upon particles of matter to be transmitted~every color combined is white light when light shines through a prism it breaks off into colors~the colors we see are called the visible light spectrum~All light waves are categorized in the electromagnetic spectrum Characteristics of Light The Electromagnetic Spectrum Both light and sound can be reflected and refracted (changing directions when entering an angle)All types of waves carry energy from one point to another Similarities Between Light and Sound Different Pitches-Wavelength As the years of discoveries of sound and light have passed we have found ways to use them to our advantage:Light- Doctors have come up with a way to use lasers in medical procedures. For example, doctors have found a way to get rid of the plaque, a tough fatty substance, by concentrating a laser onto the plaque and burning it away. This technique has been used to prevent heart attacks and strokes due to large build up of plaque on arteries. Another way lasers have been used is for burning away blood vessels that form around the retina that can cause total or partial blindness. Also, when a retina detaches from the tissue around it causing partial or total blindness can be resolved by focusing a laser at the retina and "welding" it back to its original position. Another medical use is the removing of unwanted marks on skin, such as birthmarks or port-wine stains. Finally, lasers can be used to remove unwanted tattoos. Some downsides to light is that it can be very damaging to living cells. The sun's rays are mostly made up of the whole entire electromagnetic spectrum, this includes ultra-violet rays can be extremely damaging. UV rays aren't visible to us, but small amounts of it are allowed to pass through our atmosphere that blocks other harmful waves. although UV rays can be damaging they can be useful when absorbed by the human body and transferred into Vitamin D, but we do need to avoid long amounts of exposure to direct sunlight. Lastly, infrared rays can be used to see in the dark.Sound- In the medical field doctors have found a way to direct high pitches of sound through your skin to take a "picture" of the organs below or more commonly the baby inside of the womb. They do this by using a "transducer" scanning your body that then picks up the sound waves bouncing back from your organs. Another use for ultrasounds on a larger scale is using them during a magnetic resonance imaging (MRI), during an MRI they concentrate high-frequency sound waves through the skull to cause friction to slowly burn away a tumor. Sound is also used for communication, our vocal chords produce different pitches and frequencies to form words. Sounds waves are also used in telephone communication as they travel along electrical wires. Light and Sound in the Real World VS
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