Does a mirror multiply light?

The UK eases the lockdown... a little bit, what makes our eyes move together, what makes Earth so special when it comes to supporting life, how long does a journey to Mars take, why can't I take my chemotherapy by mouth, does a mirror multiply light, and is climate change down to us, or natural temperature cycles? Join Dr Chris and Talk Radio 702's Azania Mosaka for the answers... Like this podcast? Please help us by supporting the Naked Scientists