Physics MT 3

[Thin film]

Chain: phase changes

Phase change

n incident <n reflecting

Destructive

Dark

Constructive

Light

Electromag wave

field strength → emax/bmax → wave c=f𝜆 → e²max/2𝜇ₒC

Snells law/total internal reflection

refraction → critical angle: theta 2 =90 leads to sin theta c n2/n1

Slit interference:Linear position on screen

y=Ltan(theta) = Lsin(theta)= Lm𝜆/a [fringe spacing]

Angular position

dsin(theta)m𝜆

di/v = +

Image is formed in front

unknown distance of focal step 1:

1/f = 1/s +1/s prime : for spherical f= r/2

unknown distance of focal step 2:

Determine magnification : for corrective lenses add the power 1/f

Link resistance, reactance, imped. step 1:

calc individual (xL =1/𝜔 xL) → (xc= 1/𝜔xc)

Link resistance, reactance, imped. step 2:

z= sqrt (r² + (xL+ xC)²

z= sqrt (r²+(xL+xC)²

if not given all variables set to zero then arrange

Link resistance, reactance, imped. step 3:

plug and chug: z= sqrt (r²+(xL+xC)²

Link resistance, reactance, imped. step 4:

Relate to voltage v= Iz

Link resistance, reactance, imped. find resonance:

xL=xC → w= 1/sqrt(LC)

A capacitor loses a certain charge over time, find resistance of circuit

Determine Q(remaining chage), Time(T= RC) → Final: R= - t/c*ln(q(t)/Qₒ)

Qₒ substitutes

Voltage, percent loss, time constant

Asked for a specific voltage across an object

R = p (L/a) → delta V= IpL/A

B

Units- tesla → mag field vector

converging/Convex lens

Positive focal length

Diverging/Concave lens

Negative focal length/Always virtual/negative d

How does a smaller focal length affect the lens

More powerful lens

𝜔

angular frequency

t= x/4n_c

min thickness for thin lens

F (+) focal length

convergent