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Physics - EM Spectrum (Sound Waves (They can be reflected off a hard flat…
Physics - EM Spectrum
Sound Waves
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They travel by vibrating particles. The denser the medium, the faster the sound travels
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The higher the frequency,the higher the pitch
The lower the frequency,the lower the pitch
The smaller the amplitude, the lower the sound
The higher the amplitude, the louder the sound
The waves are categories into seven groups based on their wavelengths/frequency. They form a spectrum
Radio 1m = 10^4m
Long Frequency waves can diffract around hills, tunnels ad even the world
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Wave Basics
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Wavelength
Is a full cycle from crest to crest, trough to trough or rest to rest
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Reflection, Refraction and Diffraction
Reflection
If light travelling in the same direction reflects on a uneven surface it reflects off into different angles
If light travelling in the same direction reflects on a even surface it reflects off at the same angle
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Refraction
When the light hits a different substance face on their is no diffraction.IF it hits at a angle their is diffraction
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Diffraction
When waves passes through a gap or pass an obstacle. The amount depends on the relative difference between the wavelength and gap.
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