Fichas
Reflection and Refraction
Fichas del conjunto (10)
- 1What type of wave is a sound wave? Longitudinal Electromagnetic TransverseSound waves are longitudinal waves. They cannot pass through a vacuum.
- 2Which example proves light is faster than sound? We see ripples in water after hearing a splash We see lightning before hearing thunder We hear lightning before seeing thunderSeeing lightning before hearing thunder shows us the light travels faster than sound.
- 3Which of these can happen to light waves? Reflection and diffraction only Reflection and refraction only Reflection, refraction and diffractionLight waves can be reflected and diffracted but also refracted.
- 4What is the law of reflection? The angle of incidence is always greater than the angle of reflection The angle of entry equals the angle of reflection The angle of incidence equals the angle of reflectionThe law of reflection states that the angle of incidence is always the same as the angle of reflection.
- 5What is dispersion? The splitting of light into the colours of the rainbow When waves spread out after passing through a gap When waves change speed when they enter a new mediumDispersion is the splitting of light into the colours of the rainbow.
- 6Which colour of light is refracted the least? Red Green VioletRed light is refracted the least. Refraction occurs when it enters a medium with a different density.
- 7What type of wave is a light wave? Longitudinal Transverse WaterLight waves are examples of transverse waves.
- 8How do we calculate refractive index? n = sin r ÷ sin i n = sin i ÷ sin r n = sin i × sin rThe refractive index is calculated as: n = sin i ÷ sin r.
- 9In which does light travel the fastest? Glass Water AirLight travels fastest in the least dense medium of air.
- 10Through which medium does sound travel the fastest? Solid Liquid GasSound travels fastest through solids because the particles are closest together.