# Shared Flashcard Set

## Details

Rote for PA01
Things you should know by heart!
14
Physics
08/26/2006

Term
 meson
Definition
 A meson is a hadron that is composed of a quark and an antiquark. e.g. a pion or a kaon
Term
 baryon
Definition
 A baryon is a hadron that is composed of thee quarks. It has a baryon number of +1. e.g. proton or neutron
Term
 anti-baryon
Definition
 An anti-baryon is a hadron that is composed of three anti-quarks. It has a baryon number of -1. e.g. anti-proton or anti-neutron
Term
 lepton
Definition
 A lepton is a fundamental particle (cannot be broken down into anything simpler). It has a lepton number of +1. e.g. electron, neutrino
Term
 anti-lepton
Definition
 An anti-lepton is a fundamental anti-particle (cannot be broken down into anything simpler). It has a lepton number of -1. e.g. positron, anti-neutrino
Term
 critical angle
Definition
 The critical angle is the angle of incidence, at a dense to rare boundary, which produces an angle of refraction of 90o .
Term
 electron volt
Definition
 An electron volt is the kinetic energy gained by an electron when it is accelerated across a potential difference of one volt.
Term
 The law of reflection
Definition
 The angle of incidence equals the angle of reflection. The incident ray, the reflected ray and the normal at the point of incidence are all in the same plane.
Term
 The first law of refraction
Definition
 The incident ray, the refracted ray and the normal at the point of incidence are all in the same plane.
Term
 The second law of refraction or Snell’s Law
Definition
 For rays of any particular wavelength, at the boundary between any two given materials, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant.
Term
 What is the wave equation?
Definition
 c = f x lambdawhere f = frequency (Hz);c = speed of light (m/s);lambda = wavelength (m))
Term
 What is the deBroglie equation?
Definition
 lambda dB = h/p where: h = Planck constant p = momentum of the particle (= mv where m is the relativistic mass and v is the velocity) lambda dB = deBroglie wavelength
Term
 What is the Einstein electromagnetic wave equation?
Definition
 E = hf = hc/lambda where: h = Planck constant f = frequency (Hz) c = speed of light (m/s)lambda = wavelength (m)
Term
 What is Einstein’s photoelectric effect equation?
Definition
 hf = psi + ½ mv2 where: hf = the energy of each incident photon (see above) psi = the work function of the surface (the energy which binds each electron to the surface) ½ mv2= the maximum kinetic energy of an ejected electron (many interact on their way out and therefore have less energy than this!) – you MUST put the word maximum in!!!
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