3dLight and sound

Syllabus objectives

• 3.14know that light waves are transverse waves and that they can be reflected and refracted
• 3.15use the law of reflection (the angle of incidence equals the angle of reflection)
• 3.16draw ray diagrams to illustrate reflection and refraction
• 3.17practical: investigate the refraction of light, using rectangular blocks, semi-circular blocks and triangular prismsPractical
• 3.18know and use the relationship between refractive index, angle of incidence and angle of refraction: r i n sin sin=
• 3.19practical: investigate the refractive index of glass, using a glass blockPractical
• 3.20describe the role of total internal reflection in transmitting information along optical fibres and in prisms
• 3.21explain the meaning of critical angle c
• 3.22know and use the relationship between critical angle and refractive index: nc 1=sin
• 3.23know that sound waves are longitudinal waves that can be reflected and refracted
• 3.24know that the frequency range for human hearing is 20–20 000 HzSeparate Physics only
• 3.25practical: investigate the speed of sound in airSeparate Physics onlyPractical
• 3.26understand how an oscilloscope and microphone can be used to display a sound waveSeparate Physics only
• 3.27practical: investigate the frequency of a sound wave using an oscilloscopeSeparate Physics onlyPractical
• 3.28understand how the pitch of a sound relates to the frequency of vibration of the sourceSeparate Physics only
• 3.29understand how the loudness of a sound relates to the amplitude of vibration of the sourceSeparate Physics only