1 / 15

P6 The wave model of radiation

P6 The wave model of radiation. P6.1 What are waves? . Objectives:. P6.1 What are waves? . Can you describe the difference between these two waves?. P6.1 What are waves? . P6.1 What are waves? . http:// www.science-animations.com/support-files/slinkyc.swf. P6.1 What are waves? .

dobry
Télécharger la présentation

P6 The wave model of radiation

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. P6 The wave model of radiation

  2. P6.1 What are waves? Objectives:

  3. P6.1 What are waves? Can you describe the difference between these two waves?

  4. P6.1 What are waves?

  5. P6.1 What are waves? http://www.science-animations.com/support-files/slinkyc.swf

  6. P6.1 What are waves?

  7. P6.1 What are waves?

  8. P6.1 What are waves? wave speed = frequency × wavelength What are the units?

  9. P6.1 What are waves? Try these questions: Bill counts 5 waves on a pond in 10 s. The distance between them is 80 cm. What is their speed? 5 waves in 10 s. Distance between is 80 cm. Speed? frequency = 5/10 = 0·5 Hz. speed = frequency × wavelength = 0·5 × 80 = 40 cm/s Lizireads the back label of her microwave oven. It says frequency = 2,450 MHz. The speed of microwaves is 3.00×108 m/s. What wavelength are they? frequency = 2,450 MHz. speed = 3.00×108 m/s. speed = frequency × wavelength 3.00×108= 2,450×106 × wavelength wavelength= 3.00×108 ÷ 2,450×106 = 0·122 m = 12·2 cm 3. Paul plays a note of wavelength 25 cm on his synthesiser. He knows the speed of sound is 340 m/s in air. What is its frequency? wavelength= 25 cm = 0·25 m. Speed = 340 m/s speed = frequency × wavelength 340 = frequency × 0·25 frequency = 340 ÷ 0·25 = 1,360 Hz

  10. P6.1 What are waves?

  11. P6.1 What are waves? http://www.physicsclassroom.com/class/waves/u10l2e.cfm

  12. P6.1 What are waves? • 1. The time required for the sound waves (v = 340 m/s) to travel from the tuning fork to point A is ____ . • 2. Two waves are traveling through the same container of nitrogen gas. Wave A has a wavelength of 1.5 m. Wave B has a wavelength of 4.5 m. The speed of wave B must be ________ the speed of wave A. .

  13. P6.1 What are waves? 3. TRUEor FALSE: Doubling the frequency of a wave source doubles the speed of the waves. 4. While hiking through a canyon, Noah Formula lets out a scream. An echo (reflection of the scream off a nearby canyon wall) is heard 0.82 seconds after the scream. The speed of the sound wave in air is 342 m/s. Calculate the distance from Noah to the nearby canyon wall. GIVEN: v = 342 m/s, t = 0.82 s (2-way) Find d (1-way) If it takes 0.82 s to travel to the canyon wall and back (a down-and-back time), then it takes 0.41 s to travel the one-way distance to the wall. Now use d = v • t d = v • t = (342 m/s) • (0.41 s) = 140 m

  14. P6.1 What are waves?

  15. P4 Explaining motion P4.2 What are forces? Great work year 11, see you all Monday. Period 2 & 3 in room 320

More Related