Explain why excited atoms only emit certain frequencies of radiation after an electron collides with the atom
- Radiation is emitted via photons2) Photon energy is governed by the equation E = hc/wavelength, where h = the Planck constant and c = the speed of light. Both h and c are constants3) Electrons have discrete energy levels, so the change in energy of the atom is also discrete4) As photon energy is inversely proportional to the wavelength and the photon energy is discrete, the wavelength and frequency of the emitted photons must also be discrete.
MH
Related Physics A Level answers
All answers ▸Electrons moving in a beam have the same de Broglie wavelength as protons in a separate beam moving at a speed of 2.8 × 10^4 m/s . What is the speed of the electrons?
Given the rate of thermal energy transfer is 2.7kW, the volume of the water tank is 4.5m^3, the water is at a temperature of 28oC, density of water is 1000kgm-3 & c=4200Jkg-1K-1. Calculate the rise in water temperature that the heater could produce in 1hr
Give examples of how the photoelectric effect supports the particle nature of light and defies the wave theory.
What is the difference between internal energy, temperature, and heat?