Class Central

Rankings
Career Certificates

Subjects

View all

Technology
Business
Creative
STEM
Health & Wellness
People & Society
Personal Growth & Lifestyle

View all Subjects

Universities
The Report

Courses from 1000+ universities

Rankings

Best Courses

Best of All Time
Best of the Year

Most Popular Courses

Most Popular of All Time
Most Popular of the Year

Career Certificates

Generative AI
UX Design
Data Science
Finance
DevOps
Project Management
View all Career Certificates

Technology

Computer Science
Artificial Intelligence
Data Science
Web Development
Programming
Databases
IT & Networking
DevOps
UX/UI Design
Blockchain & Cryptocurrency
Extended Reality (XR)
Generative AI
Cloud Computing
Cybersecurity
Game Development
Product Management
View all Technology

Business

Management & Leadership
Finance
Entrepreneurship
Marketing
Strategic Management
Project Management
Sales
Business Software
Real Estate
Professional Development
Accounting
Supply Chain Management
Business Strategy
Human Resources
View all Business

Creative

Music
Digital Media
Visual Arts
Design
Crafts
Performing Arts
AI Art
View all Creative

STEM

Mathematics
Engineering
Science
Statistics & Probability
Chemistry
Physics
Environmental Science
Astronomy
Biology
Agriculture
View all STEM

Health & Wellness

Disease & Disorders
Public Health
Health Care
Nursing
Mental Health
Continuing Medical Education (CME)
Medicine
Wellness
Nutrition
View all Health & Wellness

People & Society

Humanities
Education & Teaching
Social Sciences
History
Literature
Sociology
Economics
Psychology
Anthropology
Political Science
Law
Language Learning
Writing
Philosophy
Religion
View all People & Society

Personal Growth & Lifestyle

Personal Development
Sports & Recreation
Personal Finance
Parenting & Family
Food & Drink
Self-Defense & Martial Arts
Gardening
Productivity & Time Management
Games
Study Skills
Travel
Pets & Pet Care
Beauty & Makeup
Home & Living
Critical Thinking
View all Personal Growth & Lifestyle

Banning Telegram Can’t Stop Paper Leaks: Inside India’s NEET Exam Scandal

India banned Telegram after the NEET paper leak led to a retest for 2.28 million students. Class Central studied the scam, the money trail, and other platforms the leaks could move to.

Manoj Sharma Jul 29, 2026

Latest

5 Best AWS Security Courses for 2026: IAM to SCS-C03
10 Best Embroidery Courses for 2026: Begin With Basics, Expand Your Skills
Top 9 AI Governance Courses: Safe, Ethical, and Legal AI Deployment
Coursera Lays Off ~150 Staff After Udemy Merger
9 Best React Native Courses for 2026: Learn the Expo Workflow

Write for The Report

Visit The Report

600 Free Google Certifications
Trending

Most common

Popular subjects

Artificial Intelligence
34,635 courses
Language Learning
3,555 courses
Data Analysis
13,181 courses

Popular courses

Mathematical and Computational Methods
Georgetown University
AP® Microeconomics
Massachusetts Institute of Technology
Competitive Strategy
Ludwig-Maximilians-Universität München

Organize and share your learning with Class Central Lists.

View our Lists Showcase

Sign up

Log in or Sign up

Log in
Sign up

Institutions
Physics Explained

Free Online

Physics Explained Courses

41 courses

Showing 41 courses

Sort by Relevancy

Filter by

Filters

1. Free course (41)
Level
1. Intermediate (22)
2. Advanced (19)
Duration
1. < 30 mins (11)
2. 30 - 60 mins (29)
3. 1 - 2 hours (1)
Subject
1. STEM (41)
Language
1. English (41)

Deriving Hawking's Most Famous Equation - What Is the Temperature of a Black Hole?

Explore the physics of black holes and derive Hawking's famous equation using advanced high school math. Learn about black hole entropy, radiation, and thermodynamics.
- YouTube
- 41 minutes
- Self-Paced
- Free Video
Dark Energy and the Vacuum Catastrophe

Explore the vacuum energy catastrophe, quantum field theory, and general relativity to understand the universe's expansion and the mysterious dark energy driving it.
- YouTube
- 49 minutes
- Self-Paced
- Free Video
Quantum Field Theory - What Is a Particle?

Explore the concept of particles as excitations of relativistic quantum fields, from simple harmonic motion to quantum mechanics and field theory, in this accessible introduction to fundamental physics.
- YouTube
- 37 minutes
- Self-Paced
- Free Video
What is the Ultraviolet Catastrophe?

Explore the ultraviolet catastrophe, Rayleigh-Jeans law, and Planck's quantum solution in this comprehensive physics video, unraveling a pivotal moment in scientific history.
- YouTube
- 40 minutes
- Self-Paced
- Free Video
What Is Wave Particle Duality?

Explore wave-particle duality's history, from Young's experiments to de Broglie's matter-wave hypothesis, covering key concepts like interference, photoelectric effect, and quantum mechanics.
- YouTube
- 43 minutes
- Self-Paced
- Free Video
What Is the Bohr Model of the Atom?

Explore Bohr's groundbreaking atomic model, its historical context, and its impact on quantum physics. Learn about electron orbits, energy levels, and the hydrogen emission spectrum.
- YouTube
- 27 minutes
- Self-Paced
- Free Video
What Is the Riemann Hypothesis?

Explore the Riemann Hypothesis, convergent series, and Euler's solutions in this engaging introduction to complex mathematical concepts and their implications.
- YouTube
- 30 minutes
- Self-Paced
- Free Video
Estimating the Number of Atoms in the Observable Universe

Explore a simple method to estimate the vast number of atoms in the observable universe through step-by-step calculations of stars, galaxies, and cosmic structures.
- YouTube
- 21 minutes
- Self-Paced
- Free Video
What Is Compton Scattering?

Explore Compton Scattering's role in quantum physics, including wavelength shifts, conservation principles, and its significance in Quantum Field Theory.
- YouTube
- 18 minutes
- Self-Paced
- Free Video
How Many Neutrons Can You Stack Before Reality Breaks?

Explore the fascinating limits of neutron stacking and discover how quantum mechanics, relativity, and nuclear forces determine the maximum mass of neutron stars and their role in shaping our universe.
- YouTube
- 31 minutes
- Self-Paced
- Free Video
How Can a Dead Star Outshine the Sun 200,000 Times?

Uncover the extraordinary physics of pulsars - neutron stars that spin hundreds of times per second and shine brighter than 200,000 Suns through rotational energy and magnetic fields.
- YouTube
- 35 minutes
- Self-Paced
- Free Video
Why Quantum Gravity Doesn't Work

Explore why combining quantum mechanics and general relativity fails using perturbative methods, revealing the mathematical limits of our current framework at the Planck scale.
- YouTube
- 29 minutes
- Self-Paced
- Free Video
How Hidden Dimensions Actually Work

Discover how extra spatial dimensions beyond our familiar three could exist as compact, curled-up spaces too small to detect, and explore their role in string theory.
- YouTube
- 41 minutes
- Self-Paced
- Free Video
The One Principle That Explains All of Physics

Discover how the Action Principle unifies all physics, from mechanics to relativity, revealing why objects follow specific paths and connecting energy concepts to fundamental laws.
- YouTube
- 36 minutes
- Self-Paced
- Free Video
Do Electrons Ever Enter the Nucleus - Quantum Mechanics and Nuclear Physics

Explore quantum mechanics to understand if electrons can exist inside atomic nuclei, examining wavefunctions, uncertainty principles, and the role of electron-nucleus overlap in beta decay.
- YouTube
- 28 minutes
- Self-Paced
- Free Video

Career Certificates

Generative AI
UX Design
Data Science
Finance
DevOps
Project Management
All Subjects

Coursera
edX
Noble Desktop
Simplilearn
CodeSignal
Boot.dev
All Universities

The Report by Class Central RSS Feed

Series Finale of Online Education
Udemy Earns More, Pays Less
Duolingo's 2026 Strategy
1000s of Free Certificates
Best Courses Guides
Best of All Time
Most Popular of All Time

About Class Central

Class Central aggregates courses from many providers to help you find the best courses on almost any subject, wherever they exist.

Facebook
Twitter
LinkedIn
YouTube
Bluesky

Class Central © 2011-2026 Privacy Policy

About Us
Join Us
Write for Us
Help Center
Contact Us

Share

Facebook
Twitter
Bluesky
Email

Never Stop Learning.

Get personalized course recommendations, track subjects and courses with reminders, and more.

Sign up for free

Someone learning on their laptop while sitting on the floor.