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Particles between adjacent nodes and movement
moving in phase
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EMF Equation
E/Q
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1eV
1.6X10^-19Joules
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How does a wavelength change over a travelled distance
the further it travels the longer the wavelength becomes
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Light entering a block velocity
decreases
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Light entering a block wavelength
decreases
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Light entering a block frequency
stays the same
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Refractive index
V1/V2 = sin01/sin02 = diagram
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Ohms law definition
when the current is proportional to the p.d. providing the temperature of the conductor is constant
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Unpolarised light
oscillates on many planes
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Polarised light
oscillates on many planes
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Polarised glasses
-they have filters at 90 to the reflected light -they cut out the polarised light -they dont cut out the polarised light
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Current equation
E/(R+r) = EMF/TotalR
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P.d. equation
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Distance between slits increasing and the observed light
-bands become closer together -gap becomes too large for any overlap -no fringes are seen
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Why does the p.d. across a load increase as current decreases?
-R +r in series -potential divider -r is constant -as R increases so does the p.d
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When voltmeters with a large resistance are added to a circuit why doesn't the resistance change?
-connected in parallel -large value of resistance 1/voltmeters resistance -therefore a small addition to resistance
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Infrasound
below human audible range
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Longitudinal Waves
-air molecules vibrate -parallel direction of travel -series of compressions and rarefactions
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A resistor added to a circuit. effect on the total resistance
total resistance increases
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A resistor added to a circuit. effect on the p.d
p.d. stays the same
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A resistor added to a circuit. effect on the current
current decreases
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Materials with few electrons (n) and increasing temperature
the resistance will decrease as more electrons are shaken off atoms
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Materials with many electrons (n) and increasing temperature
the resistance will increase as electrons will collide with the atoms vibrations
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Coherent
constant phase relationship with the same frequency and wavelength
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Standing Wave
no transfer of energy
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Path difference
by how much they are out of phase
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Why is there a turntable in a microwave
to allow the food to move so that is experiences both hot and cold spots. this means after a while all the food has experienced the same amount of energy
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## Other cards in this set

EMF Equation

E/Q

1eV

### Card 4

#### Front

How does a wavelength change over a travelled distance

### Card 5

#### Front

Light entering a block velocity