FREE Trial

The apparatus used by the French scientist Armand Fizeau in 1849 for measuring the speed of light

Question:

The apparatus used by the French scientist Armand Fizeau in 1849 for measuring the speed of light is illustrated in Fig. 26.19. Teeth on a rotating wheel periodically interrupt a beam of light. The flashes of light travel to a plane mirror and are reflected back to an observer. Show that if the wheel is rotated at just the right frequency f, the light passing through one gap reaches the mirror and is reflected to the observer through the very next gap. When f is adjusted so this happens, show that the speed of light is given by c = 2fNL, where N is the number of gaps in the wheel, f is the frequency (in revolutions per second) made by the rotating wheel, and L is the distance between the wheel and the mirror.
The apparatus used by the French scientist Armand Fizeau in
Transcribed Image Text:

Mirror Wheel

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Answer rating: 75% (8 reviews)

The time betwee...View the full answer


answer-question-section
Answered By
tutor-profile-image
Ajeet Singh
Professional, Experienced, and Expert tutor who will provide speedy and to-the-point solutions. I have been teaching students for 5 years now in different subjects and it's truly been one of the most rewarding experiences of my life. I have also done one-to-one tutoring with 100+ students and help them achieve great subject knowledge. I have expertise in computer subjects like C++, C, Java, and Python programming and other computer Science related fields. Many of my student's parents message me that your lessons improved their children's grades and this is the best only thing you want as a teacher. I have done plenty of studying and lots of learning on many exciting and challenging topics. All these experiences have influenced my decision to take on the teaching role in various capacities. As a tutor, I am looking forward to getting to understand your needs and helping you achieve your academic goals. I'm highly flexible and contactable. I am available to work on short notice since I only prefer to work with very small and select groups of students.
4.90+ 7+ Reviews 15+ Question Solved
Related Book For  book-img-for-question
College Physics

College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

See More Books
Question Posted:
See More Questions

Related Video

Using a few basic physics principles, you can impress your friends with a trick that makes a bottle disappear. For this experiment, you will need a mini plastic bottle, glycerin, a glass, and a funnel. First, open the bottle and pour some glycerin into it, then close the bottle tightly. Next, pour some water into the glass using a funnel. Place the mini bottle into the glass of water and it will look normal. This is because light travels through air faster than it travels through the glass and water, allowing our eyes to see the bottle inside the glass. However, when you fill the mini bottle with more glycerin, and pour glycerin into the glass, then put the glycerin filled bottle into the glass with glycerin in it. Half of the bottle that is submerged in the glycerin will become invisible as the light travels through glass and glycerin at the same speed, thus it does not bend and no refraction takes place, making the bottle invisible. This happens because both glass and glycerin have almost the same refractive index, which causes the speed of light to be the same in both mediums, causing no bending of light and making the bottle disappear.

Students also viewed these Modern Physics questions

Options Trading Made Simple How To Buy Calls And Puts And Achieve Financial Freedom In Only 5 Years 1st Edition - ISBN: 1940156017 - Free Book