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Paper 2
Waves
Both
Label wavelength and amplitude on every wave diagram.
Key Facts
- Wave speed = frequency × wavelength.
- All EM waves travel at 3 × 10^8 m/s in vacuum.
Key Equations
v = f × λ
Topics Covered
Wave Properties
What you need to know
- •Wave speed = frequency × wavelength.
- •Amplitude is maximum displacement.
Exam Tips
- Check units: Hz and m.
Electromagnetic Spectrum
What you need to know
- •Radio to gamma in order.
- •Higher frequency means higher energy.
Exam Tips
- Remember microwaves use: satellite + cooking.
Key Terms
Amplitude
Maximum displacement from equilibrium.
Frequency
Number of waves per second.
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Common Exam Questions
A wave has frequency 5 Hz and wavelength 2 m. Find speed.
2 markseasyPaper 2
Model Answer
10 m/s
What examiners want to see
- ✓Use v = f × λ.
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