Multiple Choice Questions (MCQ) are exams or tests (like the IB Physics Paper 1 or the MCQ sections of A-Levels and CBSE), that evaluates the level of a student in Physics, but not only… Other aspects of a student are evaluated also: the understanding of a question, the capacity to alternative ways of thinking, the ability to think fast under time stress, the adaptation of their knowledge to new situations etc… As a Physics tutor, aimed at leading my students to success, I have worked on many past papers in physics, including MCQs, and I noticed quite a few easy strategies a student can apply to significantly maximise their grade. I decided to make this video, so that a maximum number of students can benefit from that experience. In this video, I present 12 tips and strategies to improve your grades at physics MCQs. This comes with many examples and illustrations. As a basis, I use the IB Physics Paper 1 exam. Yet, many of these tips and strategies apply to other MCQ tests in Physics like A Levels, AP and CBSE. Actually many of these strategies apply to all high school exams in physics that have a multiple choice question section. I hope this will help you reach your grade objectives in Physics, and open the door to the University of your dreams! - - - - - - - - - Content of the video: 0:00 Tips for MCQ texts in Physics, IB Physics, A-levels, CBSE (Introduction) 1:18 Context and Expectation of the MCQ paper (Tip 1) – Grade boundaries – IB Physics Paper 1 2:55 Know the instructions prior to the MCQ test (Tip 2) – IB Physics Paper 1 3:49 Use your data booklet effectively (Tip 3) – MCQ tests in Physics - IB Physics Paper 1 4:19 Read the question carefully (Tip 4) – MCQ tests in Physics (IB Physics, CBSE, A Levels, AP Physics) 5:57 Answer first the questions of the area you know best (Tip 5) - MCQ tests in Physics (IB, CBSE, A Levels, AP Physics) 6:29 Recognize Patterns (Tip 6) – Ratio MCQs in Physics (IB, CBSE, A Levels, AP Physics) 7:23 Use Elimination as an answering strategy (Tip 7) – MCQ tests in Physics (IB, CBSE, A Levels, AP Physics) 8:05 Stuck on a question? Move on! (Tip 8) – MCQ tests in Physics (IB, CBSE, A Levels, AP Physics) 8:48 Take care when filling up your answer sheet (Tip 9) – all MCQ tests in Physics 9:38 Pay special attention to keywords (Tip 10) – MCQ tests in Physics (IB, CBSE, A Levels, AP Physics) 10:36 – Answer all questions (Tip 11) – IB Physics Paper 1 12:11 – Define a smart exam preparation strategy (Tip 12) - MCQ tests in Physics (IB, CBSE, A Levels, AP Physics) - - - - - - - - - This video is produced and presented by Edouard Reny, Ph.D. in solid state chemistry and private tutor in Physical Sciences. For access to great resources that will help you with your studies of high scho ... https://www.youtube.com/watch?v=WvY1UZN0YTo

When a black body has a temperature, it emits light. This light is called black body radiation and it has a spectra (the intensity of the light depends on its wavelength.) This is why hot metal appears red, or even orange. Another example: the colour that we perceive of a star allows us to determine its surface temperature. In this video you will learn how to read a black body spectra. At the same time, we will play around with the black body spectra of the sun and answer questions like "what is the real colour of the sun?", "why does the sun appears yellow to us, then orange/red in the evening ?" and even "Why the sky is blue?". And then, we will dive into the physics of Black Body Radiation: together, we’ll realise that classical physics cannot explain the shape of the black body spectra. Worse, it predicts that heating any object, even mildly, would flood the surroundings with deadly radiation, which of course does not happen. This is called the Ultraviolet Catastrophe. We will see that quantum mechanics comes to the rescue and leads to Plank’s Law which models very well a black body spectra. The integration of Plank’s Law leads to Stefan Boltzmann’s law, and its differentiation to Wiens displacement law. Wiens displacement law allows to predict the colour of the light emitted by a body when knowing its surface temperature. We will conclude this video with a direct application of Wien’s displacement law. Content of the video: 0:00 What happens when a black body is heated? 0:56 Why does a black body emit light? (Summary of the 1st episode). 2:00 Origin of the black body spectra. 2:32 Reading a black body spectra. 3:41 What is real colour of the Sun? 4:16 Why does the sun appear yellow? 4:30 Why is the sky blue? 5:06 Why does is hot metal red ? 5:29 The shape of the black body radiation spectra. 6:20 The Ultraviolet Catastrophe: understanding black body radiation with classical physics (Rayleigh-Jeans Law). 7:13 Plank’s Law: understanding Black Body radiation with quantum mechanics. 7:43 Wiens displacement law: derivation and determining the colour of a black body from its temperature. 7:58 Wiens displacement law: application exercise. - - - - - - - - - Credits: Space background: Traverse galaxy Background: by F. Summers, G. Bacon (STScI). Simulation by C Hummels, P. Hopkins (CalTech) and A. Wetzel (UC Davis) Infrared picture of the Lemur By Arno / Coen CC BY-SA 3.0, All other illustrations not credited here on in the video are by Edouard Reny. Music by Edouard Reny. - - - - - - - - - This video is produced and presented by Edouard Reny, Ph.D. in solid state chemistry and private tutor in Physical Sciences. For access to great resources that will help you with your studies of high school Physics, visit and subscribe ... https://www.youtube.com/watch?v=ugsvADj1wts