Range Report sunlightaffect
- Thread starter beisenhowe
- Start date
Re: sunlightaffect
i've never experienced the sun "pushing" a bullet in any direction but i believe the effect you are seeing is due to how sunlight changes your perception of the target and or location of it resulting in a poi change.
i've never experienced the sun "pushing" a bullet in any direction but i believe the effect you are seeing is due to how sunlight changes your perception of the target and or location of it resulting in a poi change.
Re: sunlightaffect
up and down yes -never heard left or right - what is your source for this info ?other than the effects of wind , spin drift and world movement which do have an effect I dont think light will have any great effect on your projectile whilst in flight
up and down yes -never heard left or right - what is your source for this info ?other than the effects of wind , spin drift and world movement which do have an effect I dont think light will have any great effect on your projectile whilst in flight
Re: sunlightaffect
The sun light on your bullet does not exert a force on the bullet so it can not change the trajectory. Trust me on this as I have spent too much of my life studying physics and optics and have done a little shooting on the side. The sun, especially changing illumination conditions, can effect your site picture and that may be the cause of what you are seeing.
There is a saying that high power iron sight shooters use to compensate for glare on your front sight so your POA does not change. I forget what the saying is as I use a scope.
wade
The sun light on your bullet does not exert a force on the bullet so it can not change the trajectory. Trust me on this as I have spent too much of my life studying physics and optics and have done a little shooting on the side. The sun, especially changing illumination conditions, can effect your site picture and that may be the cause of what you are seeing.
There is a saying that high power iron sight shooters use to compensate for glare on your front sight so your POA does not change. I forget what the saying is as I use a scope.
wade
Re: sunlightaffect
Sun up sights up - sun down sights down is valid, but you also must consider light from the right and left.
Lets say you are shooting toward the south in an all day match. The sun will be coming from your left causing shadowing on the target and front sight. Later, toward the end of the day, the sun is coming from the right, again casting showdows.
I don't know about scopes but generally with my M1A, I have to crank 1/2 to 1 min to adjust, Same when clouds move in.
Sun up sights up - sun down sights down is valid, but you also must consider light from the right and left.
Lets say you are shooting toward the south in an all day match. The sun will be coming from your left causing shadowing on the target and front sight. Later, toward the end of the day, the sun is coming from the right, again casting showdows.
I don't know about scopes but generally with my M1A, I have to crank 1/2 to 1 min to adjust, Same when clouds move in.
Re: sunlightaffect
Sun light does exert a force on an object, but this would be a minuscule force and should be considered way way way after Coriolis effect and Magnus effect.
This can be demonstrated with placing a paddle wheel in a vacuum and exposing it to light: http://www.youtube.com/watch?v=PAvknXSt1js&feature=fvst
Calculations can be found here: http://www.grc.nasa.gov/WWW/k-12/Numbers/Math/Mathematical_Thinking/sunlight_exerts_pressure.htm
Again, if you look at errors in a calculator, this is orders of magnitude off of several other error sources. I would buy an optical explanation here.
Sun light does exert a force on an object, but this would be a minuscule force and should be considered way way way after Coriolis effect and Magnus effect.
This can be demonstrated with placing a paddle wheel in a vacuum and exposing it to light: http://www.youtube.com/watch?v=PAvknXSt1js&feature=fvst
Calculations can be found here: http://www.grc.nasa.gov/WWW/k-12/Numbers/Math/Mathematical_Thinking/sunlight_exerts_pressure.htm
Again, if you look at errors in a calculator, this is orders of magnitude off of several other error sources. I would buy an optical explanation here.
