DimaMazin

Cotton don't cause irritation of skin. White T-shirt protects from solar heat by reflection and evaporation.Dark T-shirt protects by evaporation,therefore you should more drink and sweat, therefore the dark T-shirt will been dirty and wet.Wet thin cotton is bad protection from UV.

Visible light has 55% of solar energy on Earth surface. UV light has 5%. You can choose heatstroke or sun tanning.

Completely wrong comparison with our discussion.White wool is transparent.Thick white cotton isn't so transparent.Woolen clothes for night weather in desert. Light cotton or linen is better for cooling than dark cotton or linen,but thin light cotton Is a bad obstacle for UV.

I have mistaken, that is equation of coordinates of times.

To reflect off better than to absorb in my region in summer.

Still I don't see equation of coordinates of times.

We can't seriously consider relativity of simultaneity without its equation.Why someone instead of the creator should make the equation?

The actual path and the modeled path are incorrect because they have no deflection angle there. What is measurement unit "us"?

I think deflection angle of photon approaching(under some angle) to mass on short part of the photon path = rs/r2 - rs/r1 Can we define the travel time of photon on the part of photon path in seconds of far observer?

Light, reflected by clock dial ,can show one and only one clock indication to any observer.

Can we define deflection angle on short part of photon path in gravitational field?

Does variable deflective index exist there?

Thank you very much, xyzt. What is variable refractive index? Is it =1/(1-2GM/rc2) ?

When scientists incorrectly define speed of object they incorrectly define mass of the object.

When a traveler uses frequency of light for definition of speed of resting object then he(she) should use my equation fs=f0 * gamma * (1 + v' * cos theta / [c-v']) v' - speed of resting object in gravitational space relative to traveler in traveler's coordinates

I think variable refractive index should be = 1/(1-2GM/rc2)1

Such equation can be right only with one measurement unit. Isn't it?The equation is useless for me because I don't know the measurement unit.

What is measurement unit of the angle?

Correct. But real lens makes refraction,gravitational lensing doesn't refract(agreeing with you),but yet it is lensing.An analogue of a thing is not the same thing. Lasers prism doesn't display dispersion,but can it deflect light?

Lasers rays create gravitational field in vacuum,isn't it?The rays can create shape which is some similarity of prism.

Does "laser prism" deflect light,which travels through it?

But what about that plural refractions,caused by non-uniform gravitational field,cause gravitational deflection of photon?

Firstly xyzt written about this, but edited after.

Thanks. Photon direction change by spherical gravitation is lensing. Then photon direction change by gravitational prism is prisming. We can make experiments with gravitational prism.We should place lasers on arch of a circle and direct their rays to one point(for example to center of the circle).Then before the point the rays create gravitational prism. I don't know maybe scientists made similar experiment.

Well.Does only length contraction factor create lensing?Does gravitational slowing of time create lensing?