Energy levels and photon emission Flashcards
What does h stand for in hf=E1-E2
h = the Plank constant 6.63 x 10-34 J s
What are the two methods of excitation?
Photon absorption and electron collision
what does f stand for in hf=E1-E2
f = the frequency of the photon in hertz (Hz)
What do E1 and E2 stand for in hf=E1-E2
E1 is the energy of energy level 1 in joules (J)
E2 is the energy of energy level 2 in joules (J)
What does each line in the emission spectrum stand for
Each corresponds to an electron moving from a higher energy level to a lower energy level. and represents a characteristic frequency.
Define Absorption spectra
When white light passes through a gas the gas absorbs particular wavelengths of light depending on their discreet energy levels.
What is the wavelength of Radio waves, in m?
10^3
What is the wavelength of Microwaves, in m?
10^-2
What is the wavelength of Infrared, in m?
10^-5
What is the wavelength of Visible light, in m?
0.5 x 10^-6
What is the wavelength of Ultraviolet light, in m?
10^-8
What is the wavelength of X-rays, in m?
10^-10
What is the wavelength of Gamma rays, in m?
10^-12
