If a light bulb is missing or broken in a series circuit, the other bulb will not light up. In a series circuit, all components are connected in a single path, so if one component fails (in this case, the broken or missing light bulb), the circuit is broken and electricity cannot flow through it. This means that the other bulb will not receive any power and will not be able to light up. Only when the broken or missing bulb is replaced can the circuit be completed again and the other bulb light up.
