Please enable JavaScript.

Coggle requires JavaScript to display documents.

c = fλ, c is the speed of light (3x10^8m/s), f is frequency (Hz) and λ is…

- - - - Shining an ultraviolet or other high frequency light on a metal surface causes electrons to be emitted from that surface
        
        Only frequencies above a certain one (different for each metal) will cause electron emission
        
        If the frequency is reached, the amount of electrons depends on the intensity of the light. Increasing frequency has no effect on the number of electrons, but gives each more kinetic energy.
        
        Electrons emitted in this matter are photoelectrons
        
        Kmax = hf - Φ
        
        Kmax = max kinetic energy, h = Planck's constant, f = frequency(Hz), Φ = work function (J or Ev)
        
        the work function is the minimum energy (when V = 0) required to release an electron.
        
        Φ = hf0
        
        Φ = work function(j or eV), h = Planck's constant, f0 = threshold frequency (Hz)
      - Photons of light striking a surface may be reflkected or absorbed. Reflected photons will not contribute to the photoelectric effect.
- - - - Diffraction - When a plane wave passes through a narrow opening, it bends around the corners of the opening
        
        double slit experiment
        
        pd = mλ, difference in path traveled by light = pd, m is any positive integer and represents the number of brightest spots from the central the position being looked at is and λ is the wavelength
        
        dsinθ = mλ, d = slit separation, θ = angle between perpendicular bisector between of the slits to a bright fringe and m and λ are the same
        
        Diffraction pattern - when the light passes through the double slit, it will experience constructive and destructive interference (shown by bright bands and dark bands respectively)
        
        lol why is this so small
        
        Significant when size of opening/obstacle is similar to or smaller than the wavelength of the wave
        
        λ / w ≥ 1, λ = wavelength of wave, w = width of gap
    - - I = Imax*(cosθ)^2
        
        I = initial intensity, Imax = final intensity, θ = stuff
    - - λmax = b/t
        
        λmax = peak wavelength of the emitted radiation(m), b = constant (2.898 * 10^-3 m K), T = surface temperature of object
      - A black body is an object that absorbs all electromagnetic waves that fall on it regardless of wavelength. Black body radiation is the radiation that is emitted by a black body