Will be updated periodically
| Front | Since energy is always conserved, the energy of an incident photon is equal to |
| Back | The threshold energy + the kinetic energy of the photoelectron\[ E = hf = \Phi + \tfrac{1}{2} m v_{\text{max}}^2 \] |
| Extras/Notes | This energy is transferred to the electron to release it from a material (the work function) and gives the emitted photoelectron the remaining amount as kinetic energy |
| Front | State what is meant by spontaneous reaction |
| Back | A process which cannot be influenced by environmental factors |
| Extras/Notes | This means radioactive decay cannot be affected by environmental factors such as: temperature, pressure, chemical conditions |
| Front | Compare transverse and longitudinal waves in terms of direction of oscillation, wave characteristics, propagation, and polarisation |
| Back | Transverse waves oscillate perpendicularly to its direction of propagation, show areas of peaks and troughs, can propagate within or without a medium, and they can be polarised.Longitudinal waves oscillate parallelly to tis direction of propagation, show areas of low pressure (rarefraction) and high pressure (compression), needs a medium to propagate, and they cannot be polarised. |
| Extras/Notes | Exam questions often just say “Compare transverse and longitudinal waves” without specifying what to compare, so be sure to memorize these 4 differences. |