PoMT

for Physics of Modern Technology @ RUG

62 flashcards · Physics · by Kristóf Nagy

1. Sneel's law refraction

   n: refractive index angle: to normal

2. refractive index

   n: refractive index c: speed in vacuum v: speed in medium

3. critical angle

   sin of second angle = 1 b second r. ind. a first r. ind.

4. lens, object image

5. lens, magnification

   i: image distance o: object distance h_i: image height h_o: object height

6. magnifying glass

7. f-number

   f-number = f-number: f/_ f: focal length D: aperture

8. telescope, magnification

   o: objective lens e: eye piece (oculair)

9. microscope, magnification

   d: distance between back-focal plane and eye piece focal plane = tube length

10. angular resolution, first minimum, telescopes

    a: angle between center and first ring L: wavelength D: aperture

11. resolution, microscope

    r: resolution (smallest feature) L: wavelength NA: Numerical Aperture

12. NA

    n: ind. of r. a: half opening angle D: aperture f: focal length

13. resolution, electron microscopy

    r: resolution a: half opening angle L: wl

14. resolution, electron microscopy, spherical aberration

    r: resolution + diameter of circle of least confusion a: half angle C_s: constant of spherical aberration

15. magnetic, memory loss after time

    t_N: avg time for magnetization to randomly flip t_0: material constant, attempt t K: magnetic anisotropy density V: volume KV: energy barrier k_B: Boltzmann constant (match units to K) T: temperature can be solved for T to get blocking temperature (T_B)

16. wl, T, f

    c: speed L: wavelength T: period time f: frequency

17. photon E

    E=f*h E: energy f: frequency h: Planck's constant

18. energy of high speed stuff

    E: energy m: mass c: speed of light v: speed of particle

19. momentum of high speed stuff

    p: momentum m: mass v: speed of particle c: speed of light

20. eV

21. resonance frequency, MRI, magnetic

    f_0: resonance frequency (Hz) B_0: magnetic field (Tesla) (gamma: gyromagnetic ratio)

22. (V)_RMS

    V: voltage T: measured time t_0: start time + also true for P

23. resistivity

24. solar cell output, and other stuff

    e: electron charge V: output voltage E_gap: bandgap energy in the cell

25. energy of e by V

26. viscosity - temperature

    n~: viscosity (Poise) n~_0: viscosity in the limit of high temperature, Constant B: Constant T: temperature T_VF: Constant

27. glass viscosity

    n~ = 10^13 poise

28. shear thinning, cross model

    n~: viscosity (poise) n~_0: starting viscosity (poise) L: characteristic time, Constant (s) .gamma: shear rate (Hz) n: shear thinning exponent, Constant (1)

29. viscosity, molecular weight

    n~_0: viscosity at equilibrium M_w: molecular weight

30. shear thinning, power-law fluids, high shear rates

    n~: viscosity m: consistency index, Constant (1/K?) .gamma: shear rate (Hz) n: Constant

31. ohm's law

    I: current V: voltage R: resistance

33. battery voltages

    V: cell voltage, emf I: current R, r: resistances

34. serial, current

    I: current

35. serial, resistance

    R: resistances

36. serial, voltage

    V: voltage, I: current, R: resistances ! but different for each user

37. parallel, voltage

    V: voltage

38. parallel, current

    I: currents

39. parallel, resistance

    R: resistances

40. voltage

    V, V difference in electric potential

41. current

    I, A flow of electric charge (C/s)

42. capacity

    C, Ah current*time total charge accumulated

43. power

    P, W PV*I=V2/R energy transfer rate, potential to do work

44. energy

    E, Wh Power*time !!! C*emf !!! (capacity*electromotiveforce)

45. energy density

    E/(m or V) = Wh/(kg or m3) energy / unit m or V

46. power density

    E/(m or V) = W/(kg or m3) maximum power / unit m or V

47. ideal gas law

48. gas, delta energy

49. gas, energy

    U: internal energy n: number of moles R: universal gas constant (J/K*mol) T: temperature (K) c_v: Constant

50. gas, c_v values

51. gas, isothermal Work

    W: work n: number of moles R: universal gas constant T: temperature V: volumes

52. gas, adiabatic process

    P*Vy=const. y = (c_v+1)/c_v not really needed

53. gas, Work

54. pipes, Bernoulli's equation

    P: pressure (Pa) p~: density (Kg/m3) v: flow velocity (m/s) y: height (m)

55. pipes, Venturi effect

    A: pipe cross-section v: flow speed

56. charge of an electron

    e = 1.6*10-19 C(oulomb)

57. P

    peta 1015

58. k

    kilo 103

59. m

    milli 10-3

60. f

    femto 10-15

61. a

    atto 10-18

62. exp decay