#shorts Amazing fact about astronauts #science #physicscommunity #darkenergy #physicsconcepts @physicspartner

Uploaded September 2023 | Updated September 2026, 2 weeks ago

One amazing fact about astronauts is that they experience the profound "Overview Effect" when seeing Earth from space, leading to a deep appreciation and desire to protect our planet. Another incredible fact is that astronauts can actually grow taller in space due to the absence of gravity compressing their spines. Additionally, astronauts undergo rigorous training for spacewalks, practicing underwater to simulate weightlessness. Living in microgravity poses unique challenges for astronauts, including muscle and bone loss, weakened immune systems, and changes in vision. Lastly, their diet in space is specially prepared and packaged, but they also receive regular shipments of fresh food to maintain psychological and physiological well-being. These facts highlight the awe-inspiring nature of astronauts' experiences and the incredible feats they overcome while exploring the cosmos.

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#shorts Amazing fact about astronauts #science #physicscommunity #darkenergy #physicsconcepts

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$The Newtonian Telescope Please dont hesitate to send an email for comments, advices, recommendation, even for support and classes. My email address is here thephysicspartner@gmail.com Please support me by subscribing my teaching channel as well. https://www.youtube.com/@teachingpartner The Newtonian telescope, also known as the Newtonian reflector, is a type of reflecting telescope invented by the English scientist Sir Isaac Newton. It utilizes a concave primary mirror and a flat diagonal secondary mirror to form an image. This design allows the telescope to collect light from a specific region of the sky and redirect it out of the optical axis at a right angle for viewing with an eyepiece . The primary mirror of the Newtonian telescope is usually parabolic in shape, and the secondary mirror redirects the light to the eyepiece . The simple yet effective design of the Newtonian telescope has made it popular among amateur telescope makers and astronomers The Newtonian telescope was developed as an alternative to refractive telescopes to combat chromatic aberrations that occurred in the latter . Unlike refracting telescopes, the Newtonian telescope uses mirrors instead of lenses to capture light, eliminating issues with chromatic aberrations and distortion . This design, first completed in 1668, remains popular due to its effectiveness and simplicity. The Newtonian telescopes design includes a primary concave mirror and a secondary flat diagonal mirror, and it is known for its light-gathering ability . However, like other reflecting telescopes using parabolic mirrors, the Newtonian telescope is subject to coma, an off-axis aberration that affects the imagery #NewtonianTelescope, #TelescopeNerd, #ReflectingTelescope, #astronomy , #opticalinstruments , #SirIsaacNewton, #TelescopeDesign, #AmateurAstronomy, #CelestialViewing, #OpticalEngineering, #HistoricalTelescopes, #spaceexploration , #physics , #science , #TelescopeTechnology, #AstronomicalObservations, #TelescopeInnovations, #TelescopeOptics, #AmateurTelescopeMaking, #TelescopeMirror, #NewtonianReflector, #TelescopeConstruction, #astronomicaldiscoveries , #DeepSpaceObservation, #NewtonianTelescopeMount, #NewtonianTelescopeDesign, #NewtonianTelescopeHistory, #NewtonianTelescopeApplications, #physicsvideos$ $Rutherford Atomic Model – observations, conclusions and limitations Please dont hesitate to send an email for comments, advices, recommendation, even for support and classes. My email address is here thephysicspartner@gmail.com Link for Thomson plum model https://www.youtube.com/watch?v=p7O-CPFzwUQ Link for Rutherford gold foil experiment https://www.youtube.com/watch?v=thH092MVs1c Rutherford’s Atomic Model It was a major challenge before the scientists at the end of the 19th century to reveal the structure of the atom as well as to explain its important properties. For this different atomic models were proposed. After Thomson’s model failed to explain certain experimental results, Rutherford, a British scientist conducted an experiment and based on the observations of this experiment gave Rutherford Atomic Model. or his experiment a thin sheet of gold was bombarded with α-particles. He then studied the trajectory of these particles after their interaction with the gold foil. He directed high energy streams of α-particles from a radioactive source at a thin sheet of gold (100 nm thickness). For studying the deflection caused to the α-particles, he placed a fluorescent zinc sulphide screen around the thin gold foil. Thomson’s atomic model was contradicted by the observations made by Rutherford. Observations of Rutherford’s Alpha Scattering Experiment Rutherford’s observation led him to conclude that: A major fraction of the α-particles bombarded by Rutherford towards the gold sheet passed through it without any deflection, and therefore most of the space in an atom is empty. Some of the α-particles were deflected by the gold sheet by very small angles, and hence it was concluded that the positive charge in an atom is not uniformly distributed. It actually concentrated in a very small volume. Only a few of the α-particles had nearly 180o angle of deflection that is very few α-particles deflected backwards. So in comparison to the total volume of an atom the volume occupied by the positively charged particles in an atom is very small. Based on the observations and conclusions of his experiment, Rutherford proposed the atomic structure of elements. According to the Rutherford atomic model: Most of the mass of an atom and the positively charged particles were concentrated in an extremely small volume. This region of the atom was called as a nucleus. His model proposed that the negatively charged electrons surround the nucleus of an atom. He also claimed that the electrons which surround the nucleus revolve around it with very high speed in circular paths. These circular paths were named as orbits by him. Nucleus being a densely concentrated mass of positively charged particles and electrons being negatively charged particles are held together by a strong electrostatic force of attraction. Limitations of Rutherford Atomic Model Rutherford atomic model also failed to explain certain things like Thomson’s Model although it was based on experimental observations. Rutherford model was not in accordance with Maxwell’s theory of electromagnetic radiations and it could not explain the stability of an atom. He proposed the electrons to be revolving around the nucleus in fixed paths called orbits. As per Maxwell’s theory, electromagnetic radiations are emitted by accelerated charged particles and hence an electron which revolves around the nucleus should emit electromagnetic radiation. This radiation from the electron would carry energy from the motion of the electron which would come at the cost of shrinking of orbits. Ultimately the electrons would collapse in the nucleus. If this were true, the atom should be highly unstable, and hence matter would not exist in the form that we know. But we know that atoms are quite stable. Rutherford model did not say anything about the arrangement of electrons in an atom which made his theory incomplete. Although the early atomic models like Thomson’s model and Rutherford’s model were inaccurate and failed to explain certain experimental results, they were the base for future developments in the world of quantum mechanics.$

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