1. please state the four uses of sound wave and explain how sound wave is used in modern technology explain through how the technology works and how its useful (in perfect sentences)

2. Write down 4 usues of electormagnetic wave and explain how it is used in modern technology. Explain throughgly how the techonologyworks and how it is useful (in perfect snetneces)

3. give and explain at least 3 evidnecs that light is a wave. Make sure that you include diffraction, polarization, and interference are included in the explanation (in complete sentence)

4. give and explain at least 2 evidnences that light is a particle. Make sure that you include photo elcetric effect in your explanation (in complete sentence)