electromagnetic energy - history, wave, wavelength, frequency

<p>Light should be viewed as a stream of particles called photons</p> Signup and view all the answers

<p>Because the binding energy was not affected by light brightness</p> Signup and view all the answers

<p>Any energy values obtained from a continuous set of energies</p> Signup and view all the answers

<p>By restricting vibrational energies to discrete values for each frequency</p> Signup and view all the answers

<p>To derive an expression for blackbody radiation with correct intensity behavior</p> Signup and view all the answers

<p>The number of ejected electrons increased with increasing brightness.</p> Signup and view all the answers

<p>Planck's quantization findings into the particle view of light.</p> Signup and view all the answers

<p>Vibrating atoms with increasing frequencies</p> Signup and view all the answers

<p>He couldn't explain why the energies were quantized</p> Signup and view all the answers

<p>Why it had not been observed in macroscopic phenomena</p> Signup and view all the answers

<p>By incorporating Planck's quantization findings into the particle view of light</p> Signup and view all the answers

<p>Ejection dependence on intensity</p> Signup and view all the answers

<p>It did not depend on brightness</p> Signup and view all the answers

<p>Amplitude which depends on frequency</p> Signup and view all the answers

<p>Continuous set of energies</p> Signup and view all the answers

<p>Photons</p> Signup and view all the answers

<p>Planck's constant (h)</p> Signup and view all the answers

<p>Atoms composing the oven vibrated at increasing frequencies as the temperature increased.</p> Signup and view all the answers

<p>He was unable to explain why the vibrating atoms required quantized energies.</p> Signup and view all the answers

<p>He incorporated Planck's quantization findings into the particle view of light, treating light as a stream of particles (photons) whose energy depended on frequency.</p> Signup and view all the answers

<p>Light striking the metal surface was viewed as a stream of particles (photons) instead of a wave.</p> Signup and view all the answers

<p>The small value of Planck's constant (6.626 × 10−34 J s) explained why energy quantization had not been observed in macroscopic phenomena.</p> Signup and view all the answers

<p>Planck's constant = A constant representing quantized energies in Planck's treatment Blackbody radiation = The phenomenon where the intensity drops rapidly for short wavelengths in the UV region Photoelectric effect = The phenomenon where electrons are ejected from a metal surface when light above a threshold frequency is shone on it Photon = Particles proposed by Albert Einstein whose energy depends on their frequency</p> Signup and view all the answers

<p>Vibrating atoms requiring quantized energies = Planck's disturbing assumption needed to resolve the blackbody radiation paradox Kinetic energy of ejected electrons in the photoelectric effect = Dependent on the frequency of the incident light, not its brightness Classical wave theory = Suggests a wave's energy depends on its intensity (amplitude), not its frequency Einstein's resolution of the photoelectric effect paradox = Incorporated Planck's quantization findings by viewing light as a stream of particles (photons)</p> Signup and view all the answers

<p>E = nhν, n=1,2,3,... = Expression derived by Planck for blackbody radiation where energy is quantized for each frequency E = hν = Formula introduced by Planck and later used by Einstein to explain the photoelectric effect in terms of photon energies E = hcλ = Alternative form of Planck's formula involving wavelength instead of frequency c = νλ = Equation relating speed of light, frequency, and wavelength</p> Signup and view all the answers

<p>Planck = Introduced quantized energies for vibrating atoms to resolve blackbody radiation paradox Albert Einstein = Incorporated Planck's quantization findings into explaining the photoelectric effect using photons Classical physicists = Allowed atoms to have any energy values from a continuous set in earlier treatments Photoelectric effect experimenters = Observed that kinetic energy of ejected electrons depended on incident light frequency, not brightness</p> Signup and view all the answers

<p>Blackbody radiation = Paradox resolved by introducing quantized energies for vibrating atoms in Planck's treatment Photoelectric effect = Paradox resolved by viewing light as photons with energy dependent on frequency according to Planck's formula Energy quantization = Not observed in macroscopic phenomena due to the very small value of Planck's constant Wave-particle duality of light = Conceptual paradox resolved by Einstein viewing light as both waves and particles</p> Signup and view all the answers