Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
Black-body radiation → B. Photoelectric effect → C. Bohr atom model → D. Quantum mechanics formalism
B
Photoelectric effect → C. Bohr atom model → D. Quantum mechanics formalism → A. Black-body radiation
C
Bohr atom model → D. Quantum mechanics formalism → A. Black-body radiation → B. Photoelectric effect
D
Quantum mechanics formalism → A. Black-body radiation → B. Photoelectric effect → C. Bohr atom model
Understanding the Answer
Let's break down why this is correct
Answer
The earliest development is the study of black‑body radiation, which led Einstein to propose the idea of energy quanta in the 1890s. Next came the photoelectric effect, explained by Einstein in 1905 using photons. In 1913 Niels Bohr introduced his quantum model of the hydrogen atom. Finally, the full formalism of quantum mechanics—matrix mechanics and wave mechanics—was established in the mid‑1920s. This chronological order shows how each breakthrough built on the previous one.
Detailed Explanation
Black‑body radiation was measured first and showed that energy comes in lumps, which made scientists think of quantization. Other options are incorrect because The photoelectric effect happened after scientists had already seen black‑body radiation; Bohr proposed a model after the photoelectric effect.
Key Concepts
Historical origins of quantum mechanics
Key experimental evidence in physics
Development of atomic theory
Topic
Historical Origins of Quantum Mechanics
Difficulty
easy level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
Ready to Master More Topics?
Join thousands of students using Seekh's interactive learning platform to excel in their studies with personalized practice and detailed explanations.