Physics: Waves: Units
Overview
Wave calculations require just five units, but getting them wrong can throw your answer out by a factor of a thousand. Wavelengths given in nanometres, frequencies in kilohertz, angles in degrees - each needs careful handling before it goes into an equation.
This reference covers the five units for the waves section of the Edexcel specification: degree, hertz, metre, metre per second and second.
Objectives
- Use the following units: degree, hertz (Hz), metre (m), metre/second (m/s) and second (s)
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Physics: Waves: Units. 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.
- Frequency is measured in: A) Metres B) Seconds C) Hertz D) Watts Answer: C
- What is 5 kHz in hertz? A) 0.005 Hz B) 50 Hz C) 500 Hz D) 5000 Hz Answer: D
- The period of a wave is measured in: A) Hertz B) Seconds C) Metres D) Degrees Answer: B
- Which conversion is correct? A) 1 nm = 10^-6 m B) 1 nm = 10^-9 m C) 1 nm = 10^-3 m D) 1 nm = 10^-12 m Answer: B
- Wave speed is measured in: A) Hz B) m/s C) m D) s Answer: B
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