Uploaded March 2025 | Updated September 2026, 1 week ago
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Quantum Mechanics Explained Quantum Physics for Beginners Understanding Quantum Mechanics Quantum Mechanics Simplified Basics of Quantum Mechanics Quantum Mechanics Tutorial Intro to Quantum Mechanics Quantum Mechanics Concepts Quantum Theory Made Simple Easy Quantum Mechanics Quantum Mechanics Overview Learning Quantum Mechanics Quantum Mechanics for Dummies Quantum Mechanics Fundamentals Quantum Mechanics in Everyday Life Quantum Physics Explained Simple Quantum Mechanics Quantum Mechanics Principles Quantum Mechanics Crash Course Quantum Mechanics in a Nutshell What is Quantum Mechanics Beginner's Guide to Quantum Mechanics Quantum Mechanics and Reality Quantum Mechanics Basics Exploring Quantum Mechanics Quantum Mechanics Made Fun Quantum Mechanics for Everyone Quantum Mechanics in Simple Terms Quantum Mechanics Demystified Discovering Quantum Mechanics Quantum Mechanics for Students The Essentials of Quantum Mechanics Quantum Mechanics Simplified for Kids Understanding Quantum Physics Quantum Mechanics for High School Easy Guide to Quantum Mechanics Quantum Mechanics Unraveled Quantum Mechanics 101 Quantum Mechanics Made Accessible Quick Overview of Quantum Mechanics Quantum Physics for Newbies Quantum Mechanics Learning Resources Introduction to Quantum Theory Quantum Mechanics Explained for Everyone What You Need to Know About Quantum Mechanics Quantum Mechanics and Its Applications Fun with Quantum Mechanics
#quantummechanics , #quantumphysics , #physicseducation , #science , #physicsforbeginners , #learnphysics , #quantumtheory , #physicseducation , #QuantumMechanicsMadeEasy, #UnderstandingQuantumMechanics, #physicsexplained , #sciencevideos , #physicstutorial , #QuantumPhysicsExplained, #QuantumMechanicsBasics, #physicsisfun , #scienceforeveryone , #physics101 , #quantumworld , #physicsconcepts , #QuantumMechanicsForDummies, #physicsexperiments , #QuantumPhysicsForBeginners, #scienceeducation , #physicsnerd , #QuantumMechanicsSimplified, #physicscommunity , #QuantumPhysicsTutorial, #scienceexplained , #physicslovers , #QuantumMechanicsOverview, #physicsinreallife , #QuantumPhysicsDemystified, #physicsfacts , #QuantumMechanicsCrashCourse, #physicsstudy , #QuantumPhysicsMadeSimple, #scienceisawesome , #physicsforkids , #QuantumMechanicsUnraveled, #PhysicsResources, #QuantumPhysicsInEverydayLife, #physicslearning , #QuantumMechanicsPrinciples, #scienceandtechnology , #physicschallenges , #QuantumPhysicsJourney, #physicsforeveryone
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![Space Part 1 - Orbital Speed (IGCSE 0625/0972)
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The topic space is the newly injected topic in 0625/0972 IGCSE physics curriculum, exam will be conducted from 2023 onwards
Important Definition
Define Rotation of Earth: The circular movement of the Earth about its own axis is called as the rotation of the Earth.
Define Average orbital speed: It is defined using the equation: v = 2??r /T where r is the average radius of the orbit and T is the orbital period
Define Solar system: Solar system is a single term that includes eight planets and their moons in orbit round the sun. Also included in the solar system are the smaller bodies such as the comets., asteroids, and the meteoroids.
Define Orbital distance: Orbital distance is the term that tells us the time taken by one object to revolve around the other.
Define Orbital duration[ Orbital time}: Orbital duration is the time taken by one object to completely orbit around the other.
Define gravitational field strength: Gravitational field strength is a term that indicates the amount of gravitational force that is exerted per unit mass at a particular point. It has a symbol g
Define Interstellar clouds of gas and dust: It is a cloud comprising of dust, plasma and gases present in all the galaxies, including our own.
Define accretion disc: These are structures that surround the celestial objects such as the stars and the black holes. These structures are made of gas, plasma and dust
Define Planetary data: It refers to the data that gives us information on the different planets based on researches and explorations
6.2 Stars and the Universe
Define Stars: Stars are massive , self-luminous celestial objects, made of Hydrogen and Helium
Define Proto stars: A Protostar is a young star. .It is formed as a result of accretion in the nebula.
Define Stable stars: In every star, there is the gas pressure that exerts an outward force from the centre and at the same time , there is gravity that is pulling the atoms of Hydrogen and Helium inwards. When the outward pushing force balances the gravitational force, we call the star as a stable tar. Example of a stable star is the Sun.
Define Sun: The Sun is a very bright, luminous, celestial and a stable star, situated in the spiral arm of the Milky Way galaxy and at the centre of the Solar System.
Define Galaxy: The word galaxy encompasses billions of stars along with their solar systems, gas and dust held by their gravity. There are more than a hundred billion galaxies in the universe.
Define Milky way: Milky way is a spiral galaxy that includes our solar system. It has billions of stars, including our Sun.
Define Universe: Universe refers to the space, time and matter and all the laws that govern them.
Define Light-year: One light-year is the distance traveled in (the vacuum of) space by light in one year.
Define Red giants: These are massive , luminous stars with a very low surface temperature and a high volume , with a reddish-orange hue, in their final stage of stellar evolution and that have exhausted their supply of Hydrogen in their core. Examples: Aldebaran (Alpha Tauri) and Mira (Omicron Ceti).
Define Red supergiants: Red supergiants are aging giant stars with a minimum of 15 solar masses. [solar mass refers to the mass of the sun, when used as a unit of mass. One solar mass is equal to 1.989 x 1030 kg ]
Define Supernova: Supernova is a powerful and luminous stellar explosion, that happens when a star has reached the end of its life. Example: Keplers Supernova
Define Nebula: Nebula is a Latin word for fog or cloud. It consists of interstellar clouds consisting of Helium, Cosmic Dust, ionized gases, hydrogen as well as molecular clouds. [There are in all 5 different types of Nebulae, namely; emission nebulae, reflection nebulae, dark nebulae, planetary nebulae, and supernova remnants.
Define Black hole: A black hole is a region in the space, in which the effect of gravity is so strong, that it lets nothing escape out f it, not even light. The region appears to be black and circular.[ There are approximately 100 billion super massive black holes]
Define Redshift: Redshift is a phenomenon in which the spectrum of an astronomical object gets displaced towards the longer( red) wavelength.
Define Cosmic microwave background radiation (CMBR): Cosmic microwave background radiation (CMBR) is the leftover of the cosmic radiation after the big bang.
Define Hubble constant Ho: Hubble constant is the ratio of the speed at which the galaxy is moving away from the Earth to its distance from the Earth Space Part 1 - Orbital Speed (IGCSE 0625/0972)](https://i.ytimg.com/vi/xT_XJeoeuAw/mqdefault.jpg)
