Things You Didn't Know Before

[timb2]

Did you know in the movie " Beneath the Planet of the Apes" that the majority of time, actor David Watson played Corneilus, not Roddy McDowell.


You can add your own

 

[timb2]

The Colossus Penguin that is now extinct, stood over 7 Feet Tall.

 

[Robbieac]

If the United States did not enter World War I, Germany would have ended up winning.

And if Germany had won World War I, there would have been no World War II, no Third Reich, no holocaust, no Soviet Union superpower, no Cold War, and no atomic bomb.

 

[rags747]

U.S. entered WWI due to the sinking of the Lusitania. Lusitania was recorded as a Dual use ship. German embassy placed ads in U.S. newspapers warning American passengers that the ship was registered as a dual use ship and to be wary of being a passenger on her due to this designation. UK wanted us in the war badly, they succeeded.

 

[Bigdog]

If the United States did not enter World War I, Germany would have ended up winning.

And if Germany had won World War I, there would have been no World War II, no Third Reich, no holocaust, no Soviet Union superpower, no Cold War, and no atomic bomb.

If an English soldier would have shot a disoriented German soldier named Adolf Hitler while he was wandering around we also might not have World II. The English soldier felt bad to shoot an enemy who looked out of sort.

 

[gtb1943]

If an English soldier would have shot a disoriented German soldier named Adolf Hitler while he was wandering around we also might not have World II. The English soldier felt bad to shoot an enemy who looked out of sort.

worst act of mercy in history

 

[YosemiteSam]

In the Laws of Physics, there is a law called the Law Of Conservation of Energy. That law states:

The law of conservation of energy states that energy cannot be created or destroyed. It can only be transformed or transferred from one form to another. This means the total energy within an isolated system remains constant over time.​

​

This law actually fails, yet it is still considered a law of physics.

While energy conservation is a cornerstone of classical physics, it relies on a mathematical principle called Noether's Theorem. This theorem states that every conservation law is the result of a specific symmetry in the universe:

• Conservation of energy specifically requires time-translation symmetry. The idea that the laws of physics and the backdrop of space stay the same from one moment to the next.
• Because the universe is expanding, space itself is changing over time. This breaks the time symmetry required for energy to be perfectly conserved on a cosmic scale.

Visible Evidence:

The most common example of this is cosmological redshift. As light travels through expanding space, its wavelength stretches. Since longer wavelengths have lower energy, the individual photons literally lose energy as they travel. In a non-expanding universe, that energy would have to go somewhere else; in an expanding one, it simply vanishes because the "rule" of conservation no longer strictly applies.

Similarly, dark energy (the postulated force driving the expansion) appears to have a constant density. As the universe expands and creates more space, the total amount of dark energy in the universe increases, meaning energy is being created out of nothing to fill the new volume.

Finally, we have the "Hubble Tension" Crisis

Beyond energy conservation, recent data from the James Webb Space Telescope has confirmed a major discrepancy known as the Hubble Tension. Different methods of measuring the universe's expansion rate are giving conflicting results that current physics cannot reconcile, leading some scientists to suggest we are on the verge of a "new physics" to explain how space-time evolves.

 

[Runwildboys]

In the Laws of Physics, there is a law called the Law Of Conservation of Energy. That law states:

The law of conservation of energy states that energy cannot be created or destroyed. It can only be transformed or transferred from one form to another. This means the total energy within an isolated system remains constant over time.​

​

This law actually fails, yet it is still considered a law of physics.

While energy conservation is a cornerstone of classical physics, it relies on a mathematical principle called Noether's Theorem. This theorem states that every conservation law is the result of a specific symmetry in the universe:

• Conservation of energy specifically requires time-translation symmetry. The idea that the laws of physics and the backdrop of space stay the same from one moment to the next.
• Because the universe is expanding, space itself is changing over time. This breaks the time symmetry required for energy to be perfectly conserved on a cosmic scale.

Visible Evidence:

The most common example of this is cosmological redshift. As light travels through expanding space, its wavelength stretches. Since longer wavelengths have lower energy, the individual photons literally lose energy as they travel. In a non-expanding universe, that energy would have to go somewhere else; in an expanding one, it simply vanishes because the "rule" of conservation no longer strictly applies.

Similarly, dark energy (the postulated force driving the expansion) appears to have a constant density. As the universe expands and creates more space, the total amount of dark energy in the universe increases, meaning energy is being created out of nothing to fill the new volume.

Finally, we have the "Hubble Tension" Crisis

Beyond energy conservation, recent data from the James Webb Space Telescope has confirmed a major discrepancy known as the Hubble Tension. Different methods of measuring the universe's expansion rate are giving conflicting results that current physics cannot reconcile, leading some scientists to suggest we are on the verge of a "new physics" to explain how space-time evolves.

Do the photons actually lose energy, or is the energy expanding within spacetime, and stretching them from a single point to multiple points, and diluting the energy?

 

[YosemiteSam]

Do the photons actually lose energy, or is the energy expanding within spacetime, and stretching them from a single point to multiple points, and diluting the energy?

It doesn't dilute like say a liquid solution. A photon has a set quantum of point energy. When that photon hits something, that energy can be measured.

Now, this in a sense will sound like dilution, but it's not. It's a physical change in energy level. Here is what happens.

When light source is moving away from you, it's red-shifted. When it's moving towards you, it's blue-shifted. All colors of light are different wavelengths / frequencies, and blue is a higher energy wavelength than red is.

When space expands, the very fabric of space stretches while the photon is in transit. This physically stretches the photon's wavelength, causing it to get red-shifted into a lower energy level than if space were static and unchanging.

If space were contracting, the photon's wavelength would be squeezed and blue-shifted, which increases the energy level of the photon.

I hope that makes sense.

 

[gtb1943]

It doesn't dilute like say a liquid solution. A photon has a set quantum of point energy. When that photon hits something, that energy can be measured.

Now, this in a sense will sound like dilution, but it's not. It's a physical change in energy level. Here is what happens.

When light source is moving away from you, it's red-shifted. When it's moving towards you, it's blue-shifted. All colors of light are different wavelengths / frequencies, and blue is a higher energy wavelength than red is.

When space expands, the very fabric of space stretches while the photon is in transit. This physically stretches the photon's wavelength, causing it to get red-shifted into a lower energy level than if space were static and unchanging.

If space were contracting, the photon's wavelength would be squeezed and blue-shifted, which increases the energy level of the photon.

I hope that makes sense.

still does not disprove the primary law
it may have transformed in ways we have no current capability of measuring

 

[Runwildboys]

It doesn't dilute like say a liquid solution. A photon has a set quantum of point energy. When that photon hits something, that energy can be measured.

Now, this in a sense will sound like dilution, but it's not. It's a physical change in energy level. Here is what happens.

When light source is moving away from you, it's red-shifted. When it's moving towards you, it's blue-shifted. All colors of light are different wavelengths / frequencies, and blue is a higher energy wavelength than red is.

When space expands, the very fabric of space stretches while the photon is in transit. This physically stretches the photon's wavelength, causing it to get red-shifted into a lower energy level than if space were static and unchanging.

If space were contracting, the photon's wavelength would be squeezed and blue-shifted, which increases the energy level of the photon.

I hope that makes sense.

I know about red shifting and blue shifting. I'm just wondering if the photons actually lose energy, or if the energy is spread out as it stretches with spacetime.

 

[gtb1943]

I know about red shifting and blue shifting. I'm just wondering if the photons actually lose energy, or if the energy is spread out as it stretches with spacetime.

we are just scratching the surface of what we know about the Universe. Nothing should be ruled out.

 

[pete026]

Is an expanding universe considered an "isolated system"? Isolated system is an important term in the law of conservation of energy.

 

[shabazz]

Did you know in the movie " Beneath the Planet of the Apes" that the majority of time, actor David Watson played Corneilus, not Roddy McDowell.


You can add your own

I'm now burning my Planet of the Apes box-set even as I type.

 

[YosemiteSam]

still does not disprove the primary law
it may have transformed in ways we have no current capability of measuring

Yes, we have found a way to measure this! In fact, we measure it precisely and constantly using photons traveling from deep space. However, because we are measuring photons from deep space, we have to rely on a mix of cosmic baselines and the fundamental laws of physics to know what their "original status" was.

When a photon travels across an expanding universe, its wavelength is stretched along with the fabric of space itself. Because a photon's wavelength determines its color (and energy), stretching the wavelength shifts it toward the red end of the spectrum. Its a phenomenon called cosmological redshift.

We don't actually need to know the exact "unknown origin" of a single random photon to measure this. Instead, we look at the atomic fingerprints inside the light, known as spectral lines.

Elements like hydrogen, helium, and iron absorb and emit light at a precise, unchangeable wavelengths based on the laws of quantum mechanics. When we look at a distant galaxy, we see the exact same pattern of hydrogen lines that we see here on Earth, but the entire pattern is shifted toward the infra-red spectrum.

By measuring how far the pattern shifted, we can calculate exactly how much the universe has expanded since that light was emitted.

The ultimate proof of this energy shift is the CMB. (Cosmic Microwave Background) The leftover radiation from the Big Bang when this light was first formed about ~400,000 years after the Big Bang, the universe was incredibly hot (around 3,000 Kelvin). The photons back then were highly energetic and where a visible yellowish white light. Today, because the universe has expanded roughly 1,100 times over the last 13.8 billion years, those photons have been stretched into the microwave spectrum. Their "temperature" has dropped to a frigid 2.7 kelvin. We measure this background radiation with absolute precision using space telescopes like COBE, WMAP, and Planck. We know its original state because the physics of a cooling, early universe dictate exactly what that light had to look like when it was born.

 

[gtb1943]

Yes, we have found a way to measure this! In fact, we measure it precisely and constantly using photons traveling from deep space. However, because we are measuring photons from deep space, we have to rely on a mix of cosmic baselines and the fundamental laws of physics to know what their "original status" was.

When a photon travels across an expanding universe, its wavelength is stretched along with the fabric of space itself. Because a photon's wavelength determines its color (and energy), stretching the wavelength shifts it toward the red end of the spectrum. Its a phenomenon called cosmological redshift.

We don't actually need to know the exact "unknown origin" of a single random photon to measure this. Instead, we look at the atomic fingerprints inside the light, known as spectral lines.

Elements like hydrogen, helium, and iron absorb and emit light at a precise, unchangeable wavelengths based on the laws of quantum mechanics. When we look at a distant galaxy, we see the exact same pattern of hydrogen lines that we see here on Earth, but the entire pattern is shifted toward the infra-red spectrum.

By measuring how far the pattern shifted, we can calculate exactly how much the universe has expanded since that light was emitted.

The ultimate proof of this energy shift is the CMB. (Cosmic Microwave Background) The leftover radiation from the Big Bang when this light was first formed about ~400,000 years after the Big Bang, the universe was incredibly hot (around 3,000 Kelvin). The photons back then were highly energetic and where a visible yellowish white light. Today, because the universe has expanded roughly 1,100 times over the last 13.8 billion years, those photons have been stretched into the microwave spectrum. Their "temperature" has dropped to a frigid 2.7 kelvin. We measure this background radiation with absolute precision using space telescopes like COBE, WMAP, and Planck. We know its original state because the physics of a cooling, early universe dictate exactly what that light had to look like when it was born.

so you are absolutely sure we know how to measure every type of energy there is; and can detect any transformations?
What arrogance

 

[YosemiteSam]

so you are absolutely sure we know how to measure every type of energy there is; and can detect any transformations?
What arrogance

lol, we can measure light with accuracy. I can tell you that much.

 

[gtb1943]

lol, we can measure light with accuracy. I can tell you that much.

we can measure SOME forms of what we identify as light

which is very little when it comes down to what WE DO NOT KNOW

We do not even have a good clue of WHAT WE DO NOT KNOW'

and you think you do?

 

[YosemiteSam]

we can measure SOME forms of what we identify as light

which is very little when it comes down to what WE DO NOT KNOW

We do not even have a good clue of WHAT WE DO NOT KNOW'

and you think you do?

I would recommend you take a courses in cosmology, astrophysics, and relativity.

 

[gtb1943]

I would recommend you take a courses in cosmology, astrophysics, and relativity.

I would recommend you read what Einstein said about scientific arrogance