Blackbody Radiation
The ideal object that absorbs all radiation and emits a continuous spectrum of wavelengths of light, dependent only on its temperature
What is a black body?
This scientist resolved the UV Catastrophe
Who is Max Planck?
The peak wavelength of a blackbody at a temperature of 2,900K (b = 2.898*10^-3)
What is 1.0 × 10^-6 m?
When an X-ray photon scatters from an electron and comes out with a longer wavelength, this effect is observed
The Compton Effect?
The momentum of a photon with a wavelength of 600nm
What is 1.11 x 10^-27 kg * m/s?
As tempurature of the blackbody increases, this happens to its strongest emitted wavelength
What is decreased?
A false prediction stated that ideal black bodies would emit this much energy at short wavelengths
What is infinite?
The temperature of a blackbody with a peak wavelength of 1.45 × 10^-6 m
2000 K
What is a photon?
The ratio of the momentum of photons with wavelengths of 400nm and 800nm
What is 2:1?
This law states that the power radiated per unit area of a blackbody is directly proportional to the fourth power of its absolute temperature
What is the Stefan-Boltzmann law?
What is Wien's Law?
The change in wavelength of a photon that Compton scatters off an electron at an angle of 60°
1.21 × 10^-12 m
In the Compton Effect, this particle recoils and carries away some of the photon's initial energy and momentum
What is an electron?
The momentum of a photon with an energy of 4.8 x 10^-16J
What is 1.6x10^-24 kg * m/s?
If a blackbody has a temperature that doubles, its power will change by what factor
What is 16?
This law does not work for short wavelengths
What is Rayleigh-Jeans law?
The momentum of a photon who carries an energy of 25J
What is 8.33 * 10^-8 kg m/s
The Compton wavelength of an electron
What is 2.43 x 10^-12 m?
The x and y vectors of the scattered photon
On other screen
What is (xsin45, -y)?
The temperature of a blackbody with the strongest emitted wavelength of 4.4 x 10^-7m (b = 2.898*10^-3)
What is 6586 degrees K?
This theory of the nature of energy was incorrect and lead to the UV Catastrophe
What is that energy is continuous?
A blackbody's temperature triples. By what factor does its radiated power change?
What is 81
A photon with an initial wavelength of 5.24 x 10^-11m scatters from an electron at an angle of 90 degrees. The scattered wavelength is
Compton wavelength = 2.43*10^-12
What is 5.48 x 10^-11m?
The momentum transferred to a perfectly reflecting surface when a photon of frequency 6.0 x 10^14 Hz is incident on it
What is 2.66 x 10^-27 kg * m/s?