UNIT IV - PARTICLES AND WAVES ACTIVITIES TOPIC 1. MATTER WAVES 1. Watch and learn from video clips by clicking the links below: Introduction to Matter Waves https://www.youtube.com/watch?v=erC_RrKXKA4 By Sophopile (2018) De Broglie wavelength | Physics | Khan Academy https://www.youtube.com/watch?v=iTRxuBxttj8 By Khan Academy (2017) 2. A) Fill up the Table 1 based from what you learned from the video clips Table 1. Questions Answers 1. Why is it that light acts as a wave? 2. What did Louie De Broglie say about the electrons? What did he receive for his work? 3. What are Matter Waves? 4. Show mathematically De Broglie wavelength for matter waves 5. Show the derivations for wavelength for matter waves with respect to a) Mass & Velocity b) Kinetic Energy c) Charge and Potential Difference 6. What are the characteristics of Matter Waves a) Not electromagnetic in nature (Why?) b) Does not necessarily have to be charged. (Why?) c) Smaller the mass, greater the wavelength (Explain using the formula) d) Greater the velocity, shorter the wavelength (Explain using the formula)e) Wavelength is independent of the particle nature f) Electron microscope works on the basis of matter waves. (How?) B) Copy a solved problem using De Broglie's equation