⚠️ EXAMINER'S TRAPS TO AVOID:

• 1.Units of H₀: Always show H₀ = v/d = (m/s)/m = s⁻¹. Don't forget the reciprocal unit!
• 2.CMBR Origin: Say "produced shortly after the Big Bang" AND "wavelength stretched by expansion" - both parts needed!
• 3.Graph Gradients: Don't forget to convert from "cm/cm" to real units using the axis scales!
• 4.Age of Universe: Use 1/H₀, not H₀ itself. Common mistake to forget the reciprocal.
• 5.Standard Candles: Type Ia supernovae are used because they have KNOWN absolute brightness - say this explicitly!