Heat rays, or infra-red rays, require a dense medium, for they cannot pass through a vacuum. Visible light can travel in a semi-vacuum and in a dense medium to a certain extent, but not as well as infra-red rays do. In an absolute vacuum there is no propagation of light. This can better be seen in the so-called holes in space, such as the "Coal Sack" in the Milky Way. In a Geissler tube also, it can be seen that light ceases to cast a shadow when the pressure within the tube is very low. However, a vacuum is the ideal medium for the propagation of waves above the frequency of visible light.
Looking at the problem in this way, the light that reaches the Earth's surface is modified. If this were not so, the chemical rays would destroy life on Earth. Behold the wisdom of God, who protects the planets close to the Sun by giving them a cloak of dense atmosphere and ether, and gives those distant ones, whose speed of revolution is low, a thin covering. The modification of solar light can be seen at sunrise or sunset, when it is red, whereas at midday it is white. This modification from white to red takes place over a distance of 6,758 km., equal to the equatorial radius of Earth, which is the extra distance the light must travel to reach the observer, compared with the light at midday. While the latter has to penetrate 400,822 km. of ether, the light of the rising Sun has to travel 407,200 km. Between white and red light there is a difference of 30,000 mgcs. per second. If the light loses 30,000 mgcs. in 6,758 km., how much will it lose in 407,200?
If the wavelength remains the same and the frequency is considerably increased, this must mean that the waves from the Sum reach the Earth's etheric covering at a much higher speed. We can see the same thing in the difference of the speed of light in the atmosphere and in water. It is only 140,000 miles per second in water, as opposed to 186,000 in the atmosphere. Therefore, density has a considerable effect on its speed. Light which becomes visible on reaching the Earth's surface reaches the etheric envelope of the Earth at a speed of 6,250,000 miles per second, and light that is above the visible spectrum on reaching the Earth arrives at far higher speeds. For the Sun emits its energy at various wavelengths and at different frequencies. Its emission is never uniform.
We have reached a point where we can say that the light of the Sun exerts on Earth a pressure equal to the weight of light, measured at the Earth's surface, plus the energy lost in traversing the 400,000 km. of etheric mass.
GB
Looking at the problem in this way, the light that reaches the Earth's surface is modified. If this were not so, the chemical rays would destroy life on Earth. Behold the wisdom of God, who protects the planets close to the Sun by giving them a cloak of dense atmosphere and ether, and gives those distant ones, whose speed of revolution is low, a thin covering. The modification of solar light can be seen at sunrise or sunset, when it is red, whereas at midday it is white. This modification from white to red takes place over a distance of 6,758 km., equal to the equatorial radius of Earth, which is the extra distance the light must travel to reach the observer, compared with the light at midday. While the latter has to penetrate 400,822 km. of ether, the light of the rising Sun has to travel 407,200 km. Between white and red light there is a difference of 30,000 mgcs. per second. If the light loses 30,000 mgcs. in 6,758 km., how much will it lose in 407,200?
If the wavelength remains the same and the frequency is considerably increased, this must mean that the waves from the Sum reach the Earth's etheric covering at a much higher speed. We can see the same thing in the difference of the speed of light in the atmosphere and in water. It is only 140,000 miles per second in water, as opposed to 186,000 in the atmosphere. Therefore, density has a considerable effect on its speed. Light which becomes visible on reaching the Earth's surface reaches the etheric envelope of the Earth at a speed of 6,250,000 miles per second, and light that is above the visible spectrum on reaching the Earth arrives at far higher speeds. For the Sun emits its energy at various wavelengths and at different frequencies. Its emission is never uniform.
We have reached a point where we can say that the light of the Sun exerts on Earth a pressure equal to the weight of light, measured at the Earth's surface, plus the energy lost in traversing the 400,000 km. of etheric mass.
GB
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