Fire from the sun and from batteries, and the phone
45 min
Some of the most talked-about fire tricks use things you might already have in your pocket: reading glasses, a bottle of water, a torch, a battery, a phone. A few of them are genuinely useful. Some are showpieces that work in a video on a sunny day and rarely anywhere else. And one, sacrificing a phone's battery, is promoted as clever when it is nearly always a serious mistake.
In this lesson
Fire from the sun: how lenses work
Magnifying lenses and spectacles
Water lenses and Fresnel lenses
Ice lens
Parabolic reflector
Battery and steel wool or foil
The phone battery judgement call
What is being suggested
What the phone can still do
What happens when a lithium cell is damaged
The narrow case
Check yourself
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The rest of this lesson is in the full course
Every module, practical and exam, self-paced and private, with a certificate at the end.
£149.00Original price was: £149.00.£99.00Current price is: £99.00.
Places on the full course open soon. Module 1 is free to try now.
