P6 - Waves

P6 - Waves

1. WAVES

   • a sound wave travels slower than a light wave
     • light travels in a straight line
     • light travels at about a hundred millionth of a second

2. the ear

   • an ear drum can be easily perforated if you listen to very loud music or sounds
     • the ear drum vibrates so you can hear sounds and if ear wax blocks it you will not hear that good
       • you can listen to music at 98db for 2 hours an you can listen to music at 86db for 6 hours

3. colours and filters

   • shining a white light trough a green filter a red book will appear green because red combined with green create black
     • a white light shines on a red book but the book remains red because it is a mixture of colours

4. waves

   • A taller sound wave means the sound that was produced was very loud
     • Closer sound waves means that the sound was very high pitch and very far apart waves mean that they are low pitch sounds