1 / 7

Aim: How can we explain wave fronts?

Aim: How can we explain wave fronts?. Do Now: A transverse wave travels at a frequency of 120 Hz with a wavelength of 2.5 m. Calculate its velocity. v = f λ v = (120 Hz)(2.5 m) v = 300 m/s. 2 meters. What is the wavelength? 3.5 λ = 21 meters λ = 6 meters. 21 meters.

orrick
Download Presentation

Aim: How can we explain wave fronts?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Aim: How can we explain wave fronts? Do Now: A transverse wave travels at a frequency of 120 Hz with a wavelength of 2.5 m. Calculate its velocity. v = fλ v = (120 Hz)(2.5 m) v = 300 m/s

  2. 2 meters • What is the wavelength? 3.5λ = 21 meters λ = 6 meters 21 meters • What is the amplitude? • A = 1 m • If the T = 8 sec., what is the f? • f = 1/T • f = 1/8 Hz • What is the velocity of the wave? • v = fλ • v = (1/8sec)(6 m) • v = 0.75 m/s

  3. Wave fronts Point Source ex: Pebble in Water Solid Lines - crests Dotted Lines - troughs Crest to crest (1 λ) Trough to trough (1 λ) Crest to trough (1/2 λ)

  4. Line Source

  5. Point Source against a barrier

  6. Example • What is the wavelength? 4λ = 80 m λ = 20 m Distance from A to B is 80 meters. 2) If frequency is 0.5 Hz, what is the period? T = 1/f T = 1/0.5 Hz T = 2 seconds 3) What is the velocity of the wave? v = fλ v = (0.5Hz)(20 m) v = 10 m/s

  7. Your Turn The distance between A and B is 120 meters. • What is the wavelength? A B 2. If the period is 3.5 seconds, what is the frequency? f = 1/T f = 1/3.5 s f = 0.29 Hz 3. What is the velocity of the wave? v = fλ v = (0.29 Hz)(24 m) v = 7 m/s 5 λ = 120 m λ = 24 m

More Related