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| light, electric field, magnetic field |
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| all orthogonal (90*) from each other |
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| electromagnetic spectrome, compare E,f,λ |
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Definition
if E increase, f increases, but λ decreases
E↑ f↑ λ ↓ |
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| highest to lowest energy waves |
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Definition
Gamma
x-ray
UV
vis
IR
microwaves
radio waves |
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| visible light longest wave length |
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| visible light highest energy |
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| angle of incidence= angle of reflection |
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Snells law
n1sinθ1=n2sinθ2 |
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1 photon of light has energy= 5
how much does 2 photons have?
have much does 1 mol of photons have? |
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Definition
multiply by 2
or avogadro's number to find a mol |
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| changing from medium to medium, f |
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| frequency never changes, but wavelength can |
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| total internal reflection |
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| what is total internal reflection? |
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| when the angle of incidence causes an angle of refraction to be = or greater than 90 sin90=1, thus sinθ2 cancels out. |
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| total internal reflection only happens when light is going |
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Definition
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| going from lower n to higher n the angle of refraction is __ |
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Definition
| smaller, bends toward the normal |
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| going from larger n to smaller n the angle of refraction will be |
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Definition
| larger, bend away from normal |
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Definition
| the index of refraction is different for different wavelengths. travel at diff speeds and get refracted diff angles. |
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| dispersion of decreased λ |
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| d λ increased n decreased angle refraction |
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| if the angle of incidence of a flashlight into a lake =60 what is the angle of reflection? (n air=1, n water=1.33) |
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Definition
60
REFLECTION incidence=reflection |
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