Properties Of Waves
Overview
Drop a stone into a still pond and something travels outwards across the surface, yet the water itself stays where it was. That is the strange and powerful idea at the heart of this topic: a wave moves energy and information from place to place without carrying any material with it.
In this lesson you will learn the vocabulary that describes every wave, from a ripple in a tank to a radio signal from a satellite, master the wave equation that links speed, frequency and wavelength, and see why every wave, without exception, can be reflected and refracted.
Objectives
- Know the definitions of amplitude, wavefront, frequency, wavelength and period of a wave
- Know that waves transfer energy and information without transferring matter
- Know and use the relationship between the speed, frequency and wavelength of a wave: v = f x lambda
- Use the above relationships in different contexts including sound waves and electromagnetic waves
- Explain that all waves can be reflected and refracted
Mind map
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Flashcards
Quick recall practice on the facts this topic is tested on.
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Properties Of Waves. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- A wave transfers: A) matter only B) energy and matter C) energy and information but not matter D) information only Answer: C
- The amplitude of a wave is measured from: A) crest to trough B) crest to crest C) the rest position to a crest D) trough to trough Answer: C
- A wave has a speed of 12 m/s and a wavelength of 3 m. Its frequency is: A) 0.25 Hz B) 4 Hz C) 9 Hz D) 36 Hz Answer: B
- When a wave is refracted, the quantity that does NOT change is its: A) speed B) wavelength C) frequency D) direction Answer: C
- A wave has a period of 0.25 s. Its frequency is: A) 0.25 Hz B) 2 Hz C) 4 Hz D) 25 Hz Answer: C
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Practice Mock Questions
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