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Physics Equations
equations for optics, electricity, magnetics and modern physics
49
Physics
Undergraduate 3
05/02/2012

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Term
double slit bright fringe angle equation: theta=
Definition
m*(lambda/d)
Term
double slit bright fringe position: y=
Definition
(m*lambda*L)/d
Term
double slit dark fringe position y'=
Definition
(m+1/2)*(lambda*L)/d
Term
change in y double slit: delta y=
Definition
(lambda*L)/d
Term
diffraction grating angle
Definition
d*sin(theta)=m*lambda
Term
diffraction grating positions y=
Definition
L*tan(theta)
Term
single slit angle dark fringes: theta=
Definition
p*(lambda/a) a=slit width, p=fringe order
Term
position dark fringes single slit y=
Definition
(p*lambda*L)/a
Term
slit width central maximum single slit: w=
Definition
(2*lambda*L)/a
Term
refraction index: n=
Definition
c/v
Term
no phase change condition
Definition
n1>n2 (v1
Term
phase change condition
Definition
n1v2)
Term
condition for constructive interference w/ 0 or 2 phase changes but destructive interference if only 1 phase change
Definition
2t=m*(lambda/n)
Term
condition for destructive interference w/ 0 or 2 phase changes but constructive interference if only 1 phase change
Definition
2t=(m+1/2)(lambda/n)
Term
snell's law
Definition
n1*sin(theta1)=n2*sin(theta2)
Term
critical angle--condition for total internal reflection: theta(critical)=
Definition
sin-1(n2/n1)
Term
thin lens equation
Definition
(1/s)+(1/s')=(1/f)
Term
magnification: m=
Definition
-(s'/s)
Term
magnification of microscope: M=
Definition
m(objective)M(eyepiece)=(-L/fobjective)*(25cm/feyepieces)
Term
telescope magnification: M=
Definition
-f(objective)/f(eyepiece)
Term
Rayleigh's Criterion for resolvable objects: theta=
Definition
(1.22*lambda)/D
Term
Coulomb's Law: F=
Definition
k*(q1*q1/r^2)
Term
Power delivered by emf: P(emf)=
Definition
I(fancy E)
Term
electric field: E=
Definition
kq/r^2 = F/q'
Term
electric field of capacitor: E=
Definition
Q/(epsilon0*A)
Term
potential electrical energy: Ue=
Definition
(k*q*q')/r
Term
electrostatic potential: Ve=
Definition
(k*q)/r
Term
electric field strenght: E=
Definition
deltaV/d
Term
capacitance: C=
Definition
(Q/deltaV) = (kappa*epsilon0*A)/d
Term
potential energy of capacitance: Uc=
Definition
(1/2)*(Q^2/C)=(1/2)*C*(deltaV)^2
Term
current definition equation: I=
Definition
delta q/delta t
Term
potential of battery: deltaV=
Definition
Wchem/q
Term
Ohm's Law: I=
Definition
V/R
Term
resistance: R=
Definition
rho*L/A
Term
Power dissipated by resistance: Pr=
Definition
I*deltaV=I^2*R=(deltaV^2)/R
Term
power definition equation: P=
Definition
energy/time
Term
Kirchhoff's Loop Law
Definition
delta Vloop=sum of (delta Vs)=0
Term
equivalent resistance in series: Req=
Definition
R1+R2+...+Rn)
Term
equivalent resistance in parallel: Req=
Definition
(1/R1 + 1/R2 +... + 1/Rn)^-1
Term
equivalent capacitance in series: Ceq
Definition
(1/C1 + 1/C2 +...+ 1/Cn)^-1
Term
equivalent capacitance in parallel: Ceq=
Definition
C1+C2+...+C3
Term
tau (electricity not relativity): tau=
Definition
RC
Term
change in potential for capacitor (charging): deltaVc=
Definition
emf(1-e^-t/tau)
Term
current in capacitor (charging): Ic=
Definition
I0*e^-t/tau
Term
change in potential for capacitor (discharging): deltaVc=
Definition
deltaV0*e^-t/tau)
Term
current in capacitor (discharging): Ic=
Definition
I0*e^-t/tau
Term
mu0=
Definition
4pi*10^-7 T m/A
Term
magnetic field wire: B=
Definition
(mu0*I)/(2pi*R)
Term
magnetic field loop: B=
Definition
(mu0*I)/2R
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