Category: Exam

  • “The Universe Runs on Entropy — Here’s How”

    Second Law of Thermodynamics: Meaning, Examples, and Real-Life Importance

  • ⭐ How the Human Heart Works: Structure, Function & Complete Circulation Explained
  • The Mystery of Complex Numbers – Explained Simply

    🧩 What is the mystery of complex numbers? At first glance, complex numbers seem unreal—literally. They involve the square root of a negative number, something that can’t exist on the real number line. But they turn out to be incredibly real and powerful in mathematics, physics, and engineering. 🧠 The Core Idea: A complex number…

  • The distance of black holes from earth

    The distance to a black hole from Earth depends on which black hole you’re talking about. Here are the most well-known ones, with accurate and simple details: 1. 🕳️ Sagittarius A* (The black hole at the center of our galaxy) 2. 🕳️ M87* (The first black hole ever imaged) 3. 🕳️ Closest Known Black Hole…

  • Time travel near a black hole is theoretically possible — but only in a specific sense:

    ✅ YES: Time Dilation (Forward Time Travel) 🔭 What happens: ⏳ So if you: This is a kind of forward time travel — proven by both theory and small-scale experiments (like with atomic clocks in airplanes or satellites). ✅ This is real and possible (in theory), though we can’t yet travel near a black hole…

  • What is actual shape of Black Hole?

    The actual shape of a black hole depends on how you’re looking at it: 🔵 1. Non-Rotating Black Hole (Schwarzschild Black Hole) 🌀 2. Rotating Black Hole (Kerr Black Hole) 👁️‍🗨️ What We See (Shadow of a Black Hole) 📷 First Real Image (M87, 2019 – Event Horizon Telescope) Would you like a visual showing…

  • Do You Know Size Of the Universe ?

    🌌 1. Observable Universe (What We Can See) 📏 Diameter: About 93 billion light-years 🧠 Imagine: You’re looking at galaxies that are so far away, you’re seeing them as they were just after the Big Bang. 🌠 2. Entire Universe (Including Beyond What We Can See) We don’t know its true size. But most cosmologists…

  • The dark matter un-revel truths

    🌌 What Is Dark Matter? “Imagine a ghost you can’t see, hear, or touch — but you know it’s there because it moves things around.”That’s dark matter — the invisible scaffolding of the universe. 👻 You Can’t See It… But It’s Everywhere Dark matter is not made of atoms, so it: Yet, scientists are 100%…

  • Gravitational Waves: Ripples in Spacetime

    Introduction Gravitational waves are ripples in the fabric of spacetime, predicted by Einstein’s General Theory of Relativity (1915) and first directly detected in 2015 by LIGO (Laser Interferometer Gravitational-Wave Observatory). These waves are generated by the most violent cosmic events—merging black holes, neutron stars, and supernovae—and provide a new way to observe the universe. 1.…

  • Is Newton’s Law of Gravitation “False”? A Modern Perspective

    Newton’s law of universal gravitation (1687) was one of the most profound scientific breakthroughs in history, accurately describing: But in light of Einstein’s general relativity (1915), we now understand Newton’s law has fundamental limitations: Where Newton’s Law Fails The Mathematical Difference Newton (1687) Einstein (1915) F = G(m₁m₂)/r² Gᵤᵥ = 8πTᵤᵥ (field equations) Instantaneous action…