What is the use of concave mirror in Feng Shui?

Concept in physics

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This article is about negative energy in physics. For other uses, see Negative energy (disambiguation)

Negative energy is a concept used in physics to explain the nature of certain fields, including the gravitational field and various quantum field effects.

Gravitational energy

Gravitational energy, or gravitational potential energy, is the potential energy a massive object has because it is within a gravitational field. In classical mechanics, two or more masses always have a gravitational potential. Conservation of energy requires that this gravitational field energy is always negative, so that it is zero when the objects are infinitely far apart. As two objects move apart and the distance between them approaches infinity, the gravitational force between them approaches zero from the positive side of the real number line and the gravitational potential approaches zero from the negative side. Conversely, as two massive objects move towards each other, the motion accelerates under gravity causing an increase in the (positive) kinetic energy of the system and, in order to conserve the total sum of energy, the increase of the same amount in the gravitational potential energy of the object is treated as negative.[1]

A universe in which positive energy dominates will eventually collapse in a Big Crunch, while an "open" universe in which negative energy dominates will either expand indefinitely or eventually disintegrate in a Big Rip. In the zero-energy universe model ("flat" or "Euclidean"), the total amount of energy in the universe is exactly zero: its amount of positive energy in the form of matter is exactly cancelled out by its negative energy in the form of gravity.[2] It is unclear which, if any, of these models accurately describes the real universe.

Black hole ergosphere

For a classically rotating black hole, the rotation creates an ergosphere outside the event horizon, in which spacetime itself begins to rotate, in a phenomenon known as frame-dragging. Since the ergosphere is outside the event horizon, particles can escape from it. Within the ergosphere, a particle's energy may become negative (via the relativistic rotation of its Killing vector). The negative-energy particle then crosses the event horizon into the black hole, with the law of conservation of energy requiring that an equal amount of positive energy should escape.

In the Penrose process, a body divides in two, with one half gaining negative energy and falling in, while the other half gains an equal amount of positive energy and escapes. This is proposed as the mechanism by which the intense radiation emitted by quasars is generated.[3]

Quantum field effects

Negative energies and negative energy density are consistent with quantum field theory.[4]

Virtual particles

In quantum theory, the uncertainty principle allows the vacuum of space to be filled with virtual particle-antiparticle pairs which appear spontaneously and exist for only a short time before, typically, annihilating themselves again. Some of these virtual particles can have negative energy. This behaviour plays a role in several important phenomena, as described below.

Casimir effect

In the Casimir effect, two flat plates placed very close together restrict the wavelengths of quanta which can exist between them. This in turn restricts the types and hence number and density of virtual particle pairs which can form in the intervening vacuum and can result in a negative energy density. Since this restriction does not exist or is much less significant on the opposite sides of the plates, the forces outside the plates are greater than those between the plates. This causes the plates to appear to pull on each other, which has been measured. More accurately, the vacuum energy caused by the virtual particle pairs is pushing the plates together, and the vacuum energy between the plates is too small to negate this effect since fewer virtual particles can exist per unit volume between the plates than can exist outside them.[5]

Squeezed light

It is possible to arrange multiple beams of laser light such that destructive quantum interference suppresses the vacuum fluctuations. Such a squeezed vacuum state involves negative energy. The repetitive waveform of light leads to alternating regions of positive and negative energy.[5]

Dirac sea

According to the theory of the Dirac sea, developed by Paul Dirac in , the vacuum of space is full of negative energy. This theory was developed to explain the anomaly of negative-energy quantum states predicted by the Dirac equation. A year later, after work by Weyl, the negative energy concept was abandoned and replaced by a theory of antimatter.[6]:&#;9&#; The following year, , saw the discovery of the positron by Carl Anderson.

Quantum gravity phenomena

The intense gravitational fields around black holes create phenomena which are attributed to both gravitational and quantum effects. In these situations, a particle's Killing vector may be rotated such that its energy becomes negative.[7]

Hawking radiation

Virtual particles can exist for a short period. When a pair of such particles appears next to a black hole's event horizon, one of them may get drawn in. This rotates its Killing vector so that its energy becomes negative and the pair have no net energy. This allows them to become real and the positive particle escapes as Hawking radiation, while the negative-energy particle reduces the black hole's net energy. Thus, a black hole may slowly evaporate.[8][9]

Speculative suggestions

Wormholes

Negative energy appears in the speculative theory of wormholes, where it is needed to keep the wormhole open. A wormhole directly connects two locations which may be separated arbitrarily far apart in both space and time, and in principle allows near-instantaneous travel between them. However physicists such as Roger Penrose regard such ideas as unrealistic, more fiction than speculation.[10]

Warp drive

A theoretical principle for a faster-than-light (FTL) warp drive for spaceships has been suggested, using negative energy. The Alcubierre drive is based on a solution to the Einstein field equations of general relativity in which a "bubble" of spacetime is constructed using a hypothetical negative energy. The bubble is then moved by expanding space behind it and shrinking space in front of it. The bubble may travel at arbitrary speeds and is not constrained by the speed of light. This does not contradict general relativity, as the bubble's contents do not actually move through their local spacetime.[5]

Negative-energy particles

Speculative theoretical studies have suggested that particles with negative energies are consistent with Relativistic quantum theory, with some noting interrelationships with negative mass and/or time reversal.[11] [12] [13]

See also

References

Inline notes

Bibliography

• Lawrence H. Ford and Thomas A. Roman; "Negative energy, wormholes and warp drive", Scientific American January , 282, Pages 46&#;53.
• Roger Penrose; The Road to Reality, ppbk, Vintage, . Chapter 30: Gravity's Role in Quantum State Reduction.

A feng shui bagua mirror (pa kua mirror) is a powerful cure to protect against negative energy and create good fortune and harmony. This type of mirror protects a house or place of business from the negative energy known as sha chi or poison arrows. It's important to select the right type of bagua mirror for your needs.

What Is a Feng Shui Bagua (Pa Kua) Mirror?

A standard bagua mirror is octagonal with a wooden back. Eight trigrams surround the round mirror in the center, one trigram on each of the octagonal sections. Outside of the trigrams, toward the outer edge of the bagua mirror, may be a Luo shu (magic square) diagram with one symbol on each of the octagonal areas. There are three basic types of bagua mirrors.

Convex Bagua Mirror

In a convex bagua mirror, the round mirror part at the center of the octagon looks like the back of a spoon; that is, it is rounded outward. Choose this type of mirror if you wish to reflect negative energy back to its source.

• Reflecting negative energy back to its source is an aggressive action, so many practitioners of feng shui prefer not to use this type of mirror except in dire circumstances.
• Using a convex bagua mirror can cause repeated bouncing of negative energy between poison arrows or other sources of sha chi and your spaces.
• Use only when the negative energy is extreme and cannot be resolved in any other fashion as using this type of mirror may make the situation worse instead of improving it.
• Examples of when energy may be excessively negative and require a convex mirror might include if your house faces a cemetery or some place with extreme negative energy, such as a hospital or court house.
• It's best not to use this type of mirror to reflect negativity directed by others towards you as it may make the situation worse.
• Because reflecting and bouncing negative energy is such an aggressive action, it may be best to consult a feng shui professional before using this type of mirror.

Concave Bagua Mirror

With a concave bagua mirror, the round mirror part at the center of the octagon looks like the bowl of a spoon; that is, it is rounded inward. Choose this type of mirror if you wish to absorb and neutralize negative energy.

• This type of mirror draws in negative energy and neutralizes it instead of reflecting it back out into the world.
• Using a concave bagua mirror ensures you remove negative energy directed at the spaces where you work, play, or live without sending negative energy back out into the universe.
• Neutralizing the energy in this way is desirable because it doesn't bounce it back and inadvertently send negative energy towards others.
• Concave mirrors are excellent to neutralize poison arrows pointed at your space, such as a roofline or a T in a road.
• Concave bauga mirrors can also neutralize energy spikes from power lines.
• In cases of extremely negative energy, such as directed and targeted negativity, it may not be a powerful enough remedy or you may need more than one mirror or a larger mirror to absorb and neutralize the energy.

Flat Bagua Mirrors

A flat bagua mirror has a flat round surface in the center of the bagua octagon. This looks just like a bathroom mirror or looking glass.

• Flat bagua mirrors are considered neutral. They deflect negative chi without absorbing or reflecting it.
• If you are unsure which type of mirror to use, choose a flat mirror, which can remedy the situation without using excessive force.

Types of Pa Kua Mirrors

Bagua mirrors may come in two different types: pre-heaven (also called early heaven) bagua and post-heaven (also called later heaven) bagua. The difference has to do with the sequence of trigrams around the outside of the octagon.

Early Heaven Bauga Mirror

The pre-heaven bagua has the trigram (also called a gua) heaven (quian) at its center top, which is three solid lines stacked one on top of the other.

• The early heaven bagua symbolizes balance of elements (yin and yang), so an early heaven squence bagua mirror is excellent when balanced energy is called for.
• This is the best type of bagua mirror to use for protection against negative energy.
• This is the best type of bagua mirror to hang over a door or window to neutralize or balance poison arrows or negative chi.

Later Heaven Bagua Mirror

The post-heaven bagua mirror has the trigram fire (li) at top center, which is two solid lines surrounding a dashed line.

• This bagua represents cycles of energy, such as birth, life, death.
• Use this type of a bagua mirror to bring about changes in energy.

When in Doubt

If you're not sure which type of energy is called for - balanced or dynamic - then choose whichever instinctively works for you.

Bagua Mirror Frame Colors and Materials

You may also select your bagua mirror based on colors or materials on the frame. Bagua mirrors may come in a variety of frame colors or materials.

• Select the color and material of your bagua mirror frame based on the direction the door or the window you will hang it above faces.
• Use a traditional bagua map to determine which sector rules the placement in order to choose the material.

Hanging Bagua Mirrors

There is generally a hook placed on the back to ensure hanging the mirror properly.

• Always hang a pre-heaven bagua mirror with the heaven trigram at the top, which is the one with the three solid lines, and the kun (earth) trigram on the bottom.
• Always hang a post-heaven bagua mirror with the fire trigram on the top and the water trigram on the bottom. Kan (Water) Trigram
• Hang baguas on the outside of your home above the door or window that has the negative energy directed at it.
• Do not hang bagua mirrors indoors without consulting a feng shui professional. In very few cases, a professional may suggest hanging a bagua mirror indoors, such as in an apartment building with interior hallways or in a window when it is impossible to hang a mirror outside.
• Always center the bagua mirror above the door or window.
• Do not use bagua mirrors as home decor. They are tools for a specific purpose and not meant to be decorative.

Bagua Mirrors for Negative Energy

Practitioners of feng shui must understand the power of feng shui bagua mirrors and make certain they use them correctly. Never use them frivolously and, if in doubt, consult a qualified feng shui professional.

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