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Mike Hinton

on 13 November 2012

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Transcript of LOGAN MEADOWS

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Images from Shutterstock.com CHAPTER 15-18 LOGAN MEADOWS Chapter 17 CHAPTER 16
sound is a type of mechancial wave it vibrates particals until the sound reaches and vibrates your eardrum.

sound waves are created by a objects movement or a noiuse that makes a vibration such as a thunder clap or a drum.

when a drum is hit sound waves vibrate particals outward from its center.

a vacuum is a empty space if a sound is made where there is no air or matieral for it to travel through the sound will be unhearable

The speed of sound depends on its medium .

te pitch of a sound and its speed is called frequency.

sound travels through liquids faster thanc gases because liquids are denser than gases.
sound travels faster through a medium at higher temperatures .

electromagnetic waves

a electromagnetic wave is a disturbance in a field.

they occur when electric charged particles move.

many of these waves come from the sun.
Its high temperature lets it give off a infinite amount of these waves.

these waves unlike others can travel in a vacuum.because they have no need ofr a medium they can pass through anything even outerspace. also because while traveling they do not lose energy.

energy that moves in this form is radiation.

these waves travel until something interferes with them the farther from the source they get the more spread out they become

All energy moves in waves.
the distance from the tip of a wave to the next waves tip is called the wavelength.

sound and light also travel as waves.
waves speeds change depending on what temperature or matierial they are traveling through.

when light rays are split up into the colors of the rainbow it is called refraction.

waves move from the center of the disturbance outward.

CHAPTER 18 Light and Optics
optics is the science of vision and light.

to see something you need to have visible light around it

the microscope uses a combonation of mirrors to reflect light in order to zoom in on something.

mirrors use a regular reflection.

the angle the light hits a mirror is the angle it will come back on the reflection.

the shape of a mirror determines if the object will be smaller larger or upside down of the original object being reflected.

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