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Vacuum can be confusing when you try to quantify it.
25Hg is less pressure than 27 Hg, of course. However, common use of "high" vacuum means how much below atmospheric pressure it is, 25Hg would be the strongest vacuum.
So, strictly speaking, the higher vacuum would be the higher value (27Hg) but the 25Hg would suck harder.
Hope that makes sense!
What else can I help you with?
Why is speed of light greater in vacuum?
Since there are essentially no particles in a vacuum to get in the light rays way. Thus less disturbance.
Is ice denser than vacuum?
Density = (mass) divided by (volume)Since the mass of any region of vacuum is zero, the density of vacuum is zero.So the density of any material is greater than the density of vacuum.
Why the index of refraction is greater than to one?
It is because the index is related to the velocity of light in air (ideally vacuum) and the medium in question. Since the velocity of light in vacuum is greater than it can be in any other media, the index of refraction of these other media relative to the vacuum is greater than 1.However, if you studied light travelling through glass and then water, the index of refraction between those two would be 0.89 (approx).
Is the speed of a radio wave in a vacuum greater than the speed of a gamma ray?
No. The speed of all electromagnetic radiation is the same in vacuum, from the longest radio wave to the shortest gamma wave.
What makes a vacuum?
A complete vacuum is created in the absence of matter, especially in gaseous form. The phenomenon of suction generally associated with a vacuum results from a pressure gradient. Since P=nRT/V and there are more moles of gas outside of the vacuum there is also a greater pressure outside of the vacuum.
What is the ratio of the speed of light in a vacuum to the speed of light in a different medium?
This is called the index of refraction. When light crosses the boundary between mediums (media) with different indices, it is bent (refracted).It's usually defined the other way around ... the ratio of the speed of light in vacuum to its speed in the medium. Since the speed of light is greater in vacuum than in any medium, the number is always greater than 1. It's referred to as the "refractive index" of the medium.
Why Refractive index the medium is always greater than 1?
The refractive index indicates how much light is slowed down as it travels through a medium compared to its speed in a vacuum. Since light travels more slowly in a medium than in a vacuum, the refractive index of the medium is always greater than 1.
Why epsilon value greater then from one for other insulater?
An epsilon value greater than one for an insulator indicates that the material has a higher dielectric constant compared to a vacuum. This implies that the insulator can store more electric field energy than a vacuum can, enhancing its ability to reduce electric field strength within the material. Such materials are often used in capacitors and other electrical applications to improve performance by allowing for greater charge storage and reduced energy loss.
What travels at a greater speed ultraviolet light or infrared?
Ultraviolet light travels at a greater speed than infrared light. This is because the speed of light is constant in a vacuum, and different wavelengths of light, such as ultraviolet and infrared, have varying frequencies and energies.
Why the effective mass of an electron is different than it mass in vacuum?
The effective mass of an electron in a material is different from its mass in vacuum because in a material, the electron interacts with the surrounding atoms and lattice structure, causing its motion to be influenced by these interactions. This results in an effective mass that can be greater or lesser than the electron's mass in vacuum.
What is the minimum value of the refractive index?
The minimum value of the refractive index is 1, which corresponds to a vacuum. The refractive index of a medium is always greater than or equal to 1.
When do light years become greater?
A light year is the distance covered by light in a year. So a light year is greatest when the speed of light is greatest: that is, in vacuum. However, since much of outer space is near vacuum, a light year is near enough a constant measure.
