Physics P1.5 0.0 / 5 ? PhysicsWavesGCSEAQA Created by: Matty_G16Created on: 20-05-16 11:41 When a longitudinal wave passes through air, what happens to the air particles at a compression? They are pushed closer together. 1 of 14 What type of wave can be produced on a stretched string? Transverse, mechanical waves. 2 of 14 What is the speed of waves with a frequency of 5 Hz and a wavelength of 2 m? 10 m/s. 3 of 14 What is the unit of frequency? Hertz, Hz. 4 of 14 What is the normal? A line drawn perpendicular to a reflecting surface. 5 of 14 What size is the image in a plane mirror? The same size as the object. 6 of 14 Why does refraction take place? Because waves change speed when they cross a boundary. 7 of 14 Why does light split up into different colours when it passes through a triangular prism? Because different wavelengths of light are refracted by different amounts. 8 of 14 Why don't we often observe the diffraction of light during everyday life? Because wavelength of light is very short. 9 of 14 What sort of waves are diffracted? All waves are diffracted. 10 of 14 What is the range of frequencies that can be heard by the human ear? 20 Hz to 20,000 Hz (20 kHz). 11 of 14 What is the reflection of a sound called? An echo. 12 of 14 What happens to the pitch of a note as the frequency increases? The pitch decreases. 13 of 14 Why do different instruments sound different when they play the same note? The wave forms are different. 14 of 14
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