50 PROBLEMAS DE FÍSICA MODERNA. Clase desde cero

The video is an exceptional educational resource for students learning modern physics. The instructor, Juan, demonstrates a deep understanding of the subject matter and employs a clear, methodical approach to problem-solving. Each problem is introduced with the relevant physical principles and formulas, ensuring that viewers understand the theoretical foundation before diving into calculations. The step-by-step solutions are meticulously detailed, with careful attention to unit conversions and dimensional analysis, which is crucial for mastering physics problems. The instructor also takes time to explain the physical significance of each result, connecting abstract equations to real-world phenomena, such as solar sails and atmospheric muons. This approach not only helps in solving the specific problems but also fosters a deeper conceptual understanding.

The content is scientifically accurate and aligns with established physics principles. The instructor correctly applies formulas for photon energy, momentum, the photoelectric effect, de Broglie wavelength, Bohr’s model, special relativity, and nuclear reactions. The use of approximations is clearly indicated, and the calculations are consistent with standard values. The video covers a comprehensive range of topics, making it a valuable resource for exam preparation or self-study.

The pedagogical quality is high: the instructor’s explanations are clear, and he often uses alternative methods to verify results, such as manipulating powers of ten manually. The pacing is appropriate, allowing viewers to follow along and even pause to work through problems independently. The inclusion of a PDF with all solved problems is a thoughtful addition that enhances the learning experience.

The video is well-structured with chapters, making it easy to navigate to specific topics. The title accurately reflects the content, and the description provides a clear overview. The only minor criticism is that some calculations are done with approximations, but this is common in physics education and does not detract from the overall quality.

Overall, this video is an excellent resource for anyone seeking to understand and solve modern physics problems. It is thorough, accurate, and pedagogically sound, making it worthy of a top rating.

The title accurately reflects the content: a complete class solving 50 modern physics problems from scratch.

9/10

The video is a comprehensive, step-by-step tutorial on modern physics problems, covering fundamental concepts with clear derivations and unit handling. The instructor demonstrates a strong grasp of the material, and the content aligns with established physics principles. The provided PDF and structured chapters enhance reliability. Minor approximations are made but are clearly indicated.

• 00:00Presentación de la clase y los cinco bloques
• 00:441. Fotón verde: frecuencia y energía
• 08:232. Energía de un fotón conocida su frecuencia
• 11:503. Número de fotones de un pulso láser
• 17:094. Fotones emitidos por segundo
• 22:045. Momento lineal de un fotón
• 25:116. Presión de radiación sobre una superficie
• 34:257. Fuerza ejercida sobre una vela solar
• 38:218. Temperatura de una estrella: ley de Wien
• 41:249. Energía de un fotón de rayos X
• 46:0610. Rayos X frente a luz verde
• 49:1611. Longitud de onda, intensidad y emisión fotoeléctrica
• 1:01:0512. Energía cinética máxima de los electrones
• 1:06:5213. Longitud de onda umbral
• 1:13:3314. Potencial de frenado
• 1:19:3515. Longitud de onda de De Broglie
• 1:23:5816. Electrón acelerado mediante 150 V
• 1:30:4517. Onda asociada a una pelota
• 1:34:2018. Incertidumbre mínima en la velocidad
• 1:38:1419. Incertidumbre en el momento y energía mínima
• 1:43:3320. Fotón y electrón con la misma longitud de onda
• 1:50:4921. Niveles de energía e ionización
• 1:55:0122. Transición del nivel n=4 al nivel n=2
• 2:05:1023. Serie de Lyman y longitudes de onda límite
• 2:16:2024. Cálculo de la constante de Rydberg
• 2:20:4725. Relación entre velocidad y radio orbital
• 2:23:5226. Máximo número de líneas espectrales
• 2:26:2727. Velocidad del electrón para n=2
• 2:29:4928. Deducción del radio de Bohr
• 2:38:2029. Excitación mediante electrones de 12,2 eV
• 2:53:4630. Átomo de hidrógeno frente al ion Li²⁺
• 3:03:3131. Factor relativista para v=0,6c
• 3:07:0732. Velocidad cuando el factor gamma vale 2
• 3:13:3033. Dilatación temporal
• 3:17:4334. Viaje relativista a una estrella
• 3:26:5135. Muones atmosféricos
• 3:34:5436. Composición relativista de velocidades
• 3:39:1837. Energía en reposo del electrón
• 3:42:5138. Energías relativistas de un protón
• 3:47:4539. Electrón con energía cinética de 1 MeV
• 3:59:3740. Energía clásica frente a energía relativista
• 4:06:4841. Composición de los núcleos atómicos
• 4:10:0442. Energía equivalente a una unidad de masa atómica
• 4:15:2243. Energía de enlace del nitrógeno 15
• 4:23:1544. Desintegración alfa
• 4:25:4345. Desintegración beta
• 4:27:2946. Energía liberada en una fisión nuclear
• 4:32:3647. Energía liberada en una fusión nuclear
• 4:37:1548. Constante de desintegración radiactiva
• 4:40:5349. Masa radiactiva restante

• PDF COMPLETO CON LOS 50 PROBLEMAS RESUELTOS — Provided in the video description as a supplementary resource with all solved problems.

• HyperPhysics - Modern Physics — A comprehensive resource covering many of the same topics, providing additional explanations and formulas.