Feb09_09Light_and_Sound

Feb09_09Light_and_Sound - Underwater Sound and Light...

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Unformatted text preview: Underwater Sound and Light Propagation Refraction Can Bend the Paths of Light and Sound through Water Sound and light both travel in waves: Refraction is the bending of waves, which occurs when waves travel from one medium to another. Sunlight does not travel well in the ocean. Scattering and absorption weaken light: Scattering occurs when light is bounced between air and water molecules, dust and other objects. Absorption occurs when light’s electromagnetic energy is converted to heat in the molecules of seawater. Water Transmits Blue Light More Efficiently Than Red Only a thin film of seawater is illuminated by the sun. Except for light generated by living organisms, most of the ocean lies in complete blackness. (a) The table shows the percentage of light absorbed in the uppermost meter of the ocean and the depths at which only 1% of the light of each wavelength remains. (b) The bars show the depths of penetration of 1% of the light of each wavelength (as in the last column of the table) Sound transmission in the ocean An analogy for refraction of waves...
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Feb09_09Light_and_Sound - Underwater Sound and Light...

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