a

Bulb vs. Laser

now I want to show you the difference

between the usual incandescent light

which you need in coherent light and the

fact of the laser so this is a 20 watt

light bulb not very bright for our

purposes but it will do as you see we

have a dark bubble over here and nothing

happened to it even if I take a glance

we try to focus the lamp on the riser

well still nothing happened to it well

let's see next what will happen if we

have a hundred milli watt laser so it's

200 times weaker light source but it

will be source of coherent light

interacts with the same balloons of

different colors and they're going to

shine the hundred milli watt laser on it

can you make a prediction what's going

to happen one two three