In a modern physics study guide, the key takeaways from Special Relativity are:
Modern physics typically covers concepts developed from the beginning of the 20th century onward, primarily focusing on relativity and quantum mechanics. Below are direct links to high-quality lecture notes and PDFs from various university curricula and academic platforms. Portland State University Comprehensive Guide modern physics notes pdf
Louis de Broglie proposed that if light can behave like a particle, matter can behave like a wave. In a modern physics study guide, the key
Arthur Compton showed that X-rays behave like particles when scattered by electrons, further confirming the particle nature of light (wave-particle duality). In a modern physics study guide