Why do green lasers appear brightest?

[Kaaklph]

I know they do, but like...why? Why are our eyes most sensitive?

 

[STI24]

quick search brought up this graph.

 

[daguin]

I know they do, but like...why? Why are our eyes most sensitive?

Because our ancestors needed to know when the fruit was ripe

Peace,
dave

 

[lasersbee]

Because our ancestors needed to know when the fruit was ripe

Peace,
dave

ROFL....:crackup::crackup:

Jerry

 

[Tech_Junkie]

Classic...:beer:

 

[Hemlock_Mike]

Dave -- You're nutz.
But Nutz aren't green when ripe !

HMike

 

[KiLLrB]

Because our ancestors needed to know when the fruit was ripe

Peace,
dave

:crackup::crackup:

 

[phoenix77]

I think it was to find out if certain female places were safe to mate in. I wouldn't want to mate with something dripping green & yellow liquids, would YOU ?
@ The Mods, if this is over the line, please delete at your convenience, Thanks &/or sorry. rob

 

[Hemlock_Mike]

Key Lime pie and honey... Sound good to me.

HMike

 

[phoenix77]

@ Hemlock _Mike, strange you should mention Key Lime Pie (my favorite). I just got done with a slice. I'll have to try it with honey on it, sounds GREAT. rob

 

[KiLLrB]

Key Lime pie and honey... Sound good to me.

HMike

MMMMmm that does sound good

 

[Kaaklph]

quick search brought up this graph.

Yeah I've seen this before, I was going to explain I've seen this curve...but all it does it plot sensetivity against wavelength, it doesn't actually tell me why green light is the most sensitive...

 

[Gryphon]

Probably due to the fact that green is right in the middle of the "visible" spectrum, and
it only makes sense that visibility would start to tapper off towards the edges

 

[Inequality]

it seems like you want a rather specific reason of why the eye in fact is more sensitive to green, since that graph was not enough for you.
quick search on wikipedia gave alot:

A range of wavelengths of light stimulates each of these receptor
types to varying degrees. Yellowish-green light, for example,
stimulates both L and M cones equally strongly, but only
stimulates S-cones weakly. Red light, on the other hand,
stimulates L cones much more than M cones, and S cones hardly
at all; blue-green light stimulates M cones more than L cones, and
S cones a bit more strongly, and is also the peak stimulant for rod
cells; and violet light stimulates almost exclusively S-cones. The
brain combines the information from each type of receptor to
give rise to different perceptions of different wavelengths of light.

source:

en.m.wikipedia.org/wiki/Color_vision?wasRedirected=true

that link might be a mobile link... But i think searching COLOR VISION will do the trick.

Hope it helped you a bit.

Greetz,
- Nicklas

 

[lazerov]

Yeah I've seen this before, I was going to explain I've seen this curve...but all it does it plot sensetivity against wavelength, it doesn't actually tell me why green light is the most sensitive...

Human eyes are most sensitive to green and yellow because of our Sun. This picture should explain it (look at the red graph):

You can see that the peak irradiation is around 500-600nm. Compare this to the Eye Colour Sensitivity graph.

 

[Deleted member 8382]

I've always been told that the humans have adapted their eyes to detect the best the most common wavelength. Since plants are exactly that "555nm green", we focused on that color and for this reason our eyes are more sensitive to it, and for that this is the wavelength on the middle of the visible spectrum.

This theory however, implies that probably polar bears have adapted to all colors due to the snow being white, or maybe to blue due to the sky color. This would explain why many animals can see IR wavelengths that we can't, etc...

Yours,
Albert