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Cosmic Microwave Background (CMB) radiation is the afterglow of the Big Bang, providing a snapshot of the universe approximately 380,000 years after its formation. It is a uniform, faint glow of microwave radiation that fills the universe, with a temperature of about 2.7 Kelvin. The CMB is crucial for understanding the early universe's conditions, revealing information about its composition, structure, and expansion. Its discovery in 1965 provided strong evidence for the Big Bang theory and has since been instrumental in cosmology.
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What is the earliest time in the universe that you can directly observe?
The earliest time in the universe that we can directly observe is the cosmic microwave background radiation, which dates back to about 380,000 years after the Big Bang. This radiation provides a snapshot of the universe at that time, when it cooled enough for atoms to form and light to travel freely.
How does cosmic backround radiation soupourt the big bang?
According to the Big Bang theory, the the Universe started off as a compact region filled with a uniform glow from the extremely hot hydrogen plasma. As the universe expanded, the plasma and the radiation became cooler. Eventtually, it had cooled enough to allow stable atoms to form and these could no longer absorb the thermal radiation. The universe therefore became transparent instead of being an opaque fog.Due to the subsequent expansion of the universe, the photons which set off at that time have been red shifted from their original frequency to radiation in the microwave region of the spectrum (approx 160 GHz).
What is lonosphere?
The ionosphere is a region of Earth's upper atmosphere that is ionized by solar and cosmic radiation. It plays a crucial role in long-distance radio communications by reflecting radio waves back to Earth. The ionosphere is divided into different layers based on the density of free electrons present.
Most of the solar radiation absorbed by Earth's surface is later radiated back into space as which type of electromagnetic radiation?
Most of the solar radiation absorbed by Earth's surface is later radiated back into space as infrared radiation. This process helps to maintain Earth's energy balance and regulate its temperature.
What is the ideal radiation budget?
Radiation budget is Earth's atmosphere. The Earth's atmosphere has more solar energy than it radiates back to space.
What are the weaknesses of cosmic background radiation?
the weakness of cosmic back ground radiation as those radiation are left over of big bangs
What is the earliest time in the universe that you can directly observe?
The earliest time in the universe that we can directly observe is the cosmic microwave background radiation, which dates back to about 380,000 years after the Big Bang. This radiation provides a snapshot of the universe at that time, when it cooled enough for atoms to form and light to travel freely.
How long does it take for a microwave radar signal to travel from Earth to the Moon and back?
Approximately 2.5 secs. A 'microwave' is an electro-magnetic radiation, in the same manner as light, and uv. radiation. Being an electro-magnetic radiation it will travel at the speed of light, which is 'c' = 3.8 x 10^8 m/s
What happens if you stare at a microwave?
Staring at a microwave while it's in operation is not recommended as the microwave emits radiation that can be harmful to the eyes. Prolonged exposure may lead to eye damage or injuries. It is best to stand back and avoid direct eye contact with the microwave while it is in use.
How does cosmic backround radiation soupourt the big bang?
According to the Big Bang theory, the the Universe started off as a compact region filled with a uniform glow from the extremely hot hydrogen plasma. As the universe expanded, the plasma and the radiation became cooler. Eventtually, it had cooled enough to allow stable atoms to form and these could no longer absorb the thermal radiation. The universe therefore became transparent instead of being an opaque fog.Due to the subsequent expansion of the universe, the photons which set off at that time have been red shifted from their original frequency to radiation in the microwave region of the spectrum (approx 160 GHz).
Why do microwaves ovens have shields in them to stop waves scaping?
Microwave ovens have shields to prevent microwave radiation from escaping and causing potential harm to humans. The shielding is made of metal that reflects the microwaves back into the oven, ensuring they are contained and do not leak out. This helps to protect individuals from exposure to harmful radiation.
What is needed for cosmologists to study the age of the universe?
The age of the universe goes back to the Big Bang. The Bang resulted in a release of energy in the form of radiation. Due to the expansion of the Universe since that time the original radiation has been red-shifted to the microwave range. The background microwave radiation is the best tool for studying the age of the universe.
How do you replace a range hood with a microwave?
Remove range hood. Install microwave. Start to wonder why you did that. Put it back the way it was. Take microwave back to store and find out they won't take it back after you installed it.
Why there is cosmic microwave back ground and not cosmic light wave back ground?
That is interesting question! The light from all the sides of the universe is coming probably from the thousands of universes that are around your universe. They are far away from your universes. That is why the your space telescope can not locate the source. It is perceived as 'Glow'. That means the 'light' coming from there is 'practically' parallel. The exactly parallel light has to come from infinity. That is 'not' possible. Now the question is there that how the light turns up into microwave. Here goes the answer. You know that the light is affected by the heavy gravitational force. Light does not come out of the black hole due to heavy gravitational force. Light gets bent when going near by the black holes. That gives you the gravitational lens effect. Your universe is surrounded by three big bang masses, that has not exploded. When the light comes from the outer universes to you, it is comes through the area of too heavy gravitational force. So it is pulled back. So the energy of the light waves become less to turn them into microwaves. That is why you get the cosmic microwave back ground instead of cosmic light wave back ground.It is a psychological problems to imagine very very large things.
What were people's first reactions to the microwave when it first came out?
I hope that it doesn't blow up or have a radiation effect on me. Hay, you know what maybe I will just back away slowly then... !!!!!!_RUN_!!!!!! ============== I remember my father, who is an engineer, being afraid of what might happen if the microwave was turned on without anything inside of it.
What do you know that supports the big bang theory?
Hello i am minakshi and the evidences that supports big bang theory is - 1-observations of cosmic back ground microwave radiation (COBR)which is done by cosmic background explorer(COBE) 2-the hubble laws that tells that the universe is expanding with the speed of 70km/sec for every megparsec 3-the presence of light elements ie. hydrogen and helium. 4-and the equation of einstein genral theory of relavity it also supportsbig bang theory. still there are many evidences which suports big bang theory
What is the single explanation for acceleration in the expansion rate of the universe and cosmic microwave background and the biggest void in your universe?
There are three puzzles in the astronomy. First is to why there is acceleration in the expansion rate of the universe. Second puzzle is that why there is cosmic microwave background. The third puzzle is that why there is big void in the universe. There is probably single explanation for all the three puzzles. The theory or the hypothesis is that your universe is surrounded by four pre big bang masses. They are in turn are surrounded by four universes like yours. They are in turn surrounded by four pre big bang masses. It is just like the three dimensional structure of the diamond. The total number of universes can not be guessed. But you can guess that there is limit to the number of such universes and they can give balanced gravitational force on each other. That part is beyond the scope of present discussion. So the four pre big bang masses have been pulling your universe towards them, soon after the onset of big bang. The net gravitational force by those four pre big bang masses was zero before the big bang. Once your universe got exploded in all the directions, all the pre big bang masses particularly and other universes in general, started pulling the pieces of your universe towards themselves. This happened due to the force of gravity by those massive bodies. So your universe has been falling on those four pre big bang masses. So there is no force like dark energy, which is pushing your universe away. The same theory can explain the cosmic microwave back ground also. The cosmic microwave background is in the form of "glow". That means you are unable to locate the source of light. Cosmic microwave background is not associated with any stars or galaxies. Such type of glow light indicate that the rays are practically parallel. That means the lens of your space telescope perceives the radiation as parallel radiation. So the source of radiation is probably too far, for the astronomical scale also. So the radiation has been coming from other universes, which are too much away from your universe. The light is too much "red shifted" to become microwave radiation. That means that this radiation has come through the areas of "very high" gravitational force. This very high gravitational force is generated by the three pre big bang masses. The radiation has been coming from all sides means that there are too many sources of light around your universe. The same theory also explain the presence of the largest void in the space. When our universe exploded in the big bang event, it started to expand in the space. As there are very massive four pre big bang masses are there to pull the universe towards themselves, the pieces of our universe will be directed towards them. That has created the biggest void in the space. It is roughly triangular as expected. The diamond shape can be easily explained by relative rotation of our universe to the position of those four pre big bang masses. The absence of any radiation also can be explained by the very high gravitational pull on the cosmic microwave back ground by those four pre big bang masses. There are probably total four such very big voids in our universe as per the theory. You have located the one, which is near to you. The smaller voids and clusters of galaxies are probably the echoes, that are produced due to four very dense masses of galaxies and biggest voids, that are present in the space, as expected.
