A Level topic.
| Text | The minimum energy needed for pair production is the total {{c1::rest energy}} for the particles produced.{{c1::Rest energy}} is the energy produced if all the mass of a particle was transformed into energy. |
| Back Extra | \[E_{\text{min}}=2E_0\]\(E_{\text{min}}\) is needed to follow the conservation of energy. |
| Front | Weak interaction |
| Back | If quarks change character/flavour it's weak interaction.Neutrinos are often involved in weak interactions. |
| Text | Fundamental ForceEffectRelative StrengthRange (m) Strong NuclearExperienced by {{c1::nucleons}}{{c1::1}}{{c1::~10-15 (femtometres)}} |
| Back Extra |