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propagation
The more dense a material is the faster sound will travel. Sound is dampened when the medium it is traveling through doesn't vibrate well; and when two different sounds cross there will be some places where the sound is amplified and where it is cancelled out, it has to do with the alignment of the crests and troughs, this is a phenomena that occurs with sound and light.
why it is more difficult to develop sound theories in the behavioral sciences than it is to explain phenomena in the natural sciences.
Anywhere where there is light or sound!
Loudness is to brightness as sound is to light.
propagation
Light and sound both move in waves. Light is much faster than sound. Light waves are smaller than sound waves.
No, it is a physical phenomena.
Refracting is the phenomena that takes place when sound waves are reflected from a surface along parallel lines. During this phenomena the phase velocity of the wave changes but the frequency of the wave stays the same.
The more dense a material is the faster sound will travel. Sound is dampened when the medium it is traveling through doesn't vibrate well; and when two different sounds cross there will be some places where the sound is amplified and where it is cancelled out, it has to do with the alignment of the crests and troughs, this is a phenomena that occurs with sound and light.
Oh it does ! Try shining a light, even a laser, through a small hole in foil or cardboard. When comparing sound and light, don't forget to allow for the difference in wavelength, and adjust the dimensions of the expected phenomena accordingly. Maybe a better comparison would be between sound and radio ... FM or low-band TV ... since the wavelengths are comparable.
why it is more difficult to develop sound theories in the behavioral sciences than it is to explain phenomena in the natural sciences.
No. If a vibration is smaller, the sound is higher pitched. To get a quieter sound the amplitude of the sound-wave needs to be smaller. +++ It depends whether you mean amplitude or wavelength being "smaller", and they are two different things. If the vibration's amplitude is smaller the sound is quieter irrespective of frequency. If the vibration is more rapid, the frequency is higher but the wavelength correspondingly smaller irrespective of amplitude.
Light is faster than sound
Because these two phenomena, joined by scientifically not quite correct metaphora "waves" - are based on different principles. Sound needs media to travel. Light doesn't need. Sound is basically vibrations of media molecules less distance between molecules (higher density) better and faster energy transfer. For light it's almost completely opposite. Light is being absorbed and reemitted by media molecules. This process takes some time which is slows down light speed.
Anywhere where there is light or sound!
Loudness is to brightness as sound is to light.