Question

Does laser light spreads out the same way as a light bulb? Would the area be the same? Is this relevant to the area that goes within this equation: I = P/area? What would a graph like this look like?

Answer 1

"NO"

the laser light will not spreads out the same way as a light bulb,

because LASER light has a characteristics are :

1 )

High Directionality

2 )

High Brightness

3 )

Monochromatic wavelength

4 )

Coherence

based on these four characteristics, the Laser light is different from the ordinary light.

especially the high brightness and low Divergence.

the area will be different everything is different.

intensity = Power / area

is relevant for every light source

because as power increases area will be less then intensity of light is high.

when graph is plot between intensity and power it is straight line,

and graph is plot between intensity or power and area will inverse straight line, as based on the shown formula.