What is the equation for calculating the de Broglie wavelength of a particle? βοΈ
Anonymous Quiz
14%
Ξ» = mv
72%
Ξ» = h/p
12%
Ξ» = Ξx Ξp
2%
Ξ» = gt
π3β€2π₯1π1
The Smartest Living Mathematical Physicist
Ed Witten discussing with Quantum Pioneer Paul Dirac, Sicily, Italy, 1981.
Image Source: https://www.kyotoprize.org/en/211112
Ed Witten discussing with Quantum Pioneer Paul Dirac, Sicily, Italy, 1981.
Image Source: https://www.kyotoprize.org/en/211112
Dr. Jocelyn Bell Burnell is long overdue a Nobel Prize in the area of Physics.
Her work contributed to the discovery of the pulsar, small sized, their diameters are 20 km or less, spherical objects in space that contain more mass than the sun.
At the time she was a postgraduate at Cambridge and the Nobel Prize in Physics, in 1974, went to her supervisor who was given credit for her discovery. Dr. Burnell has been recognized with many award and honors, including the Special Breakthrough Prize in Fundamental Physics (2018), which carried a cash award of 2.3 million pounds. She donated the money towards charity organizations which help individuals from underrepresented populations become physicists.
Her work contributed to the discovery of the pulsar, small sized, their diameters are 20 km or less, spherical objects in space that contain more mass than the sun.
At the time she was a postgraduate at Cambridge and the Nobel Prize in Physics, in 1974, went to her supervisor who was given credit for her discovery. Dr. Burnell has been recognized with many award and honors, including the Special Breakthrough Prize in Fundamental Physics (2018), which carried a cash award of 2.3 million pounds. She donated the money towards charity organizations which help individuals from underrepresented populations become physicists.
https://youtube.com/shorts/K3h0ahaecxQ?feature=share
Richard Feynman talking about different thinking levels in humans
Richard Feynman talking about different thinking levels in humans
YouTube
Richard Feynman talking about different thinking level
Richard Feynman was a great theoretical physicist of 20th century.Facebook- Ayushphy CosmologicalTwitter- @ayushphycosmosInstagram- @ayushphy_cosmological......
From COSMOS by Carl Sagan
If the general picture, however, of a Big Bang followed by an expanding universe is correct - what happened before that? Was the universe devoid of all matter and then the matter suddenly somehow created? How did that happen? In many cultures, a customary answer is that a "God" or "Gods" created the universe out of nothing, but if we wish to pursue this question courageously we must, of course, ask the next question - where did God come from? If we decide that this is an unanswerable question, why not save a step and conclude that the origin of the universe is an unanswerable question? Or if we say that God always existed, why not save a step and conclude that the universe always existed? There's no need for a creation, it was always here. These are not easy questions. Cosmology brings us face to face with the deepest mysteries, with questions that were once treated only in religion and myth.
"Who knows for certain? Who shall here declare it? Whence was it born? Whence came creation? The Gods are later than this world's formation, who then can know the origins of the world? None knows whence creation arose or whether he has or has not made it - he who surveys it from the lofty skies. Only he knows, or perhaps he knows not." These words are 3500 years old. They're taken from the Rigveda: a collection of early Sanskrit hymns. The most sophisticated ancient cosmological ideas came from Asia and particularly from India. Here there's a tradition of sceptical questioning and unselfconscious humility before the great cosmic mysteries. Amidst the routine of daily life, in say the harvest and winnowing of grain, people all over the world have wondered, where did the universe come from? Asking this question is a hallmark of our species. There's a natural tendency to understand the origin of the cosmos in familiar biological terms - the mating of cosmic deities or the hatching of a cosmic egg or maybe the intonation of some magic phrase. The big bang is our modern scientific creation myth, it comes from the same human need to solve the cosmological riddle.
Most cultures imagine the world to be only a few hundred human generations old. Hardly anyone guessed that the cosmos might be far older but the ancient Hindus did. They, like every other society, noted and calibrated the cycles in nature: the rising and setting of the sun and stars; the phases of the moon; the passing of the seasons. All over south India, an age old ceremony takes place every January, a rejoicing in the generosity of nature in the annual harvesting of the crops. Every January nature provides the rice to celebrate Pongal. Even the drought animals are given the day off and garlanded with flowers. Colourful designs are painted on the ground to attract harmony and good fortune for the coming year. Pongal, a simple porridge - a mixture of rice and sweet milk - symbolizes the harvest; the return of the seasons. However this is not merely a harvest festival, it has ties to an elegant and much deeper cosmological tradition.
The Pongal festival is a rejoicing in the fact that there are cycles in nature, but how could such cycles come about unless the Gods willed them and if there are cycles in the years of humans might there not be cycles in the eons of the Gods? The Hindu religion is the only one of the world's great faiths dedicated to the idea that the cosmos itself undergoes an immense, indeed an infinite, number of deaths and rebirths. It is the only religion in which the time scales correspond, no doubt by accident, to those of modern scientific cosmology. Its cycles run from our ordinary day and night to a day and night of Brahma; 8.64 billion years long. Longer than the age of the earth or the sun, and about half the time since the Big Bang - and there are much longer time scales still.
If the general picture, however, of a Big Bang followed by an expanding universe is correct - what happened before that? Was the universe devoid of all matter and then the matter suddenly somehow created? How did that happen? In many cultures, a customary answer is that a "God" or "Gods" created the universe out of nothing, but if we wish to pursue this question courageously we must, of course, ask the next question - where did God come from? If we decide that this is an unanswerable question, why not save a step and conclude that the origin of the universe is an unanswerable question? Or if we say that God always existed, why not save a step and conclude that the universe always existed? There's no need for a creation, it was always here. These are not easy questions. Cosmology brings us face to face with the deepest mysteries, with questions that were once treated only in religion and myth.
"Who knows for certain? Who shall here declare it? Whence was it born? Whence came creation? The Gods are later than this world's formation, who then can know the origins of the world? None knows whence creation arose or whether he has or has not made it - he who surveys it from the lofty skies. Only he knows, or perhaps he knows not." These words are 3500 years old. They're taken from the Rigveda: a collection of early Sanskrit hymns. The most sophisticated ancient cosmological ideas came from Asia and particularly from India. Here there's a tradition of sceptical questioning and unselfconscious humility before the great cosmic mysteries. Amidst the routine of daily life, in say the harvest and winnowing of grain, people all over the world have wondered, where did the universe come from? Asking this question is a hallmark of our species. There's a natural tendency to understand the origin of the cosmos in familiar biological terms - the mating of cosmic deities or the hatching of a cosmic egg or maybe the intonation of some magic phrase. The big bang is our modern scientific creation myth, it comes from the same human need to solve the cosmological riddle.
Most cultures imagine the world to be only a few hundred human generations old. Hardly anyone guessed that the cosmos might be far older but the ancient Hindus did. They, like every other society, noted and calibrated the cycles in nature: the rising and setting of the sun and stars; the phases of the moon; the passing of the seasons. All over south India, an age old ceremony takes place every January, a rejoicing in the generosity of nature in the annual harvesting of the crops. Every January nature provides the rice to celebrate Pongal. Even the drought animals are given the day off and garlanded with flowers. Colourful designs are painted on the ground to attract harmony and good fortune for the coming year. Pongal, a simple porridge - a mixture of rice and sweet milk - symbolizes the harvest; the return of the seasons. However this is not merely a harvest festival, it has ties to an elegant and much deeper cosmological tradition.
The Pongal festival is a rejoicing in the fact that there are cycles in nature, but how could such cycles come about unless the Gods willed them and if there are cycles in the years of humans might there not be cycles in the eons of the Gods? The Hindu religion is the only one of the world's great faiths dedicated to the idea that the cosmos itself undergoes an immense, indeed an infinite, number of deaths and rebirths. It is the only religion in which the time scales correspond, no doubt by accident, to those of modern scientific cosmology. Its cycles run from our ordinary day and night to a day and night of Brahma; 8.64 billion years long. Longer than the age of the earth or the sun, and about half the time since the Big Bang - and there are much longer time scales still.
There is the deep and appealing notion that the universe is but the dream of the God who, after a hundred Brahma years, dissolves himself into a dreamless sleep and the universe dissolves with him until after another Brahma century he stirs, recomposes himself and begins again to dream the great cosmic lotus dream. Meanwhile, elsewhere there are an infinite number of other universes each with its own God dreaming the cosmic dream. These great ideas are tempered by another, perhaps still greater. It is said that men may not be the dreams of the Gods but rather that the Gods are the dreams of men.
From COSMOS by Carl Sagan
From COSMOS by Carl Sagan
π2
Henok
From COSMOS by Carl Sagan If the general picture, however, of a Big Bang followed by an expanding universe is correct - what happened before that? Was the universe devoid of all matter and then the matter suddenly somehow created? How did that happen? Inβ¦
Media is too big
VIEW IN TELEGRAM
Carl Sagan | Cosmos| Rig Veda
In science, progress often comes from standing on the shoulders of giants, but sometimes it comes from tripping them.
Dr. Abdus Salam
He shared the 1979 Nobel Prize in Physics with "SheldonGlashow and "StevenWeinberg for his contribution to the electroweak unification theory.
According to modern physics, four "fundamental_forces exist in nature. "Electromagnetic interaction is one of these. The "weak interaction - responsible, for example, for the beta decay of nuclei - is another.
In 1968, these two interactions were unified to one single theory, called "electroweak, by professor Abdus Salam and the same time by Glashow & Weinberg. The theory predicted, for example, that weak interaction manifests itself in "neutral weak currents" when certain elementary particles interact. This was later confirmed.
He shared the 1979 Nobel Prize in Physics with "SheldonGlashow and "StevenWeinberg for his contribution to the electroweak unification theory.
According to modern physics, four "fundamental_forces exist in nature. "Electromagnetic interaction is one of these. The "weak interaction - responsible, for example, for the beta decay of nuclei - is another.
In 1968, these two interactions were unified to one single theory, called "electroweak, by professor Abdus Salam and the same time by Glashow & Weinberg. The theory predicted, for example, that weak interaction manifests itself in "neutral weak currents" when certain elementary particles interact. This was later confirmed.
β€5π1
In 1887, Heinrich Hertz conducted a series of experiments that confirmed the existence of electromagnetic waves, laying the foundation for the study of radio waves and later the development of radio and television technology.
Hertz's experiments were the first to demonstrate that electromagnetic waves could be transmitted and received through the air, and his work was a crucial step in the development of wireless communication technology.
Hertz's experiments were the first to demonstrate that electromagnetic waves could be transmitted and received through the air, and his work was a crucial step in the development of wireless communication technology.
β€3π1