Chapter 22: Particle Nature of Light Flashcards
What is the particle nature of light?
“The particle nature of light refers to the concept that light can also be described as discrete packets of energy called photons.”
What is a photon?
“A photon is a quantum of electromagnetic radiation
What is the energy of a photon?
“The energy of a photon is given by the equation E = hf
What is the photoelectric effect?
“The photoelectric effect is the phenomenon where electrons are ejected from a material when it is exposed to light of sufficient frequency.”
What did Einstein propose about the photoelectric effect?
“Einstein proposed that light consists of discrete packets of energy (photons)
What is the work function?
“The work function (ϕ) is the minimum energy required to eject an electron from a material during the photoelectric effect.”
What is the threshold frequency?
“The threshold frequency (f₀) is the minimum frequency of light required to cause the photoelectric effect in a material.”
What is the equation for the kinetic energy of ejected electrons?
“The kinetic energy (K.E.) of ejected electrons is given by K.E. = hf - ϕ
What is the wave-particle duality of light?
“The wave-particle duality of light refers to the concept that light exhibits both wave-like and particle-like properties depending on the experiment or observation.”
What is the Compton effect?
“The Compton effect is the scattering of high-energy photons (such as X-rays) by electrons
What is the equation for the Compton shift?
“The Compton shift is given by Δλ = h / (mₑc) * (1 - cos(θ))
What is the de Broglie wavelength?
“The de Broglie wavelength is the wavelength associated with a moving particle
What is the dual nature of matter?
“The dual nature of matter refers to the idea that matter
What is the concept of energy quantization?
“Energy quantization refers to the idea that energy is emitted or absorbed in discrete quantities
What is the photoelectric equation?
“The photoelectric equation relates the energy of the incident photon
What is the relationship between photon energy and frequency?
“The energy of a photon is directly proportional to its frequency: E = hf
What is the significance of the photoelectric effect in quantum mechanics?
“The photoelectric effect provided strong evidence for the particle nature of light
What is the concept of the Heisenberg uncertainty principle?
“The Heisenberg uncertainty principle states that it is impossible to simultaneously know both the exact position and momentum of a particle with arbitrary precision.”
