Quantum Phenomena 0.0 / 5 ? PhysicsQuantum physicsASAQA Created by: heyaitsaliceCreated on: 12-05-14 18:18 When electromagnetic radiaton is above a certain frequency a electron is emitted, this is the _______ effect Photoelectric 1 of 17 Photoelectric emission does happen is the frequency is below the _______ frequency. Threshold 2 of 17 What term is the same as the minimum energy to release an electron? Work Function 3 of 17 If the __ is lower than the work function, an electron can not be emitted hf 4 of 17 What unit is the work function in? Joules 5 of 17 Light can travel as a ______, which transfers energy in packets Particle 6 of 17 The wave-like nature of an electron is observed when what happens? Diffraction 7 of 17 If the energy exceeds the work function value, what does the particle use it as? Kinetic Energy 8 of 17 when inside a flourescent tube, the photons emitted from the mercury are what? Ultraviolet 9 of 17 Electrons passing through a flourescent tube create ____ when they collide with atoms of gas Ions 10 of 17 Electrons that absorb energy from colliding electrons without being ionised are what? Excited 11 of 17 When excitation occurs an electron moves up an energy level, from what? Ground State 12 of 17 When the electron moves back down to a lower energy level, producing a photon, this is called what? De-excitation 13 of 17 By measuring what, on a line spectrum, you can identify the element that produced the light. Wavelength 14 of 17 No other element produces the same pattern of light wavelengths. This is because the energy levels are ______ to that atom. Unique 15 of 17 The particle-like nature of an electron is observed in what? Photoelectricity 16 of 17 The wave-like behaviour of the particle can be workout out by calculating what wavelength? De Broglie 17 of 17
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