Grade 12 physics

Assignment 10: Special Relativity and Quantum Mechanics Assignment Part 1: Special Relativity and Quantum Mechanics 1. A spaceship is leaving Earth to show the effects of special relativity on length contraction and time dilation. The ship moves at 0.8c, and an onboard astronaut measures its length as 140m. How long does the spaceship appear to people on Earth? [5K] 2. The astronauts on the spaceship have an extremely accurate clock. They return to Earth exactly 8 years after they leave according to their onboard clock, still moving at 0.8c. How much time has passed from the perspective of someone on Earth? [5K] Please write 4-6 sentences explaining one of the following quantum mechanics concepts in your own words. I am not expecting a full 100% understanding, since they are advanced topics. Just an overall description of what they are, and what they prove. You may need to do some extra research to help explain. If so, please add the link you used to your submission. [5A] a. The Photoelectric Effect b. Planck's Quantization of Energy c. Ultraviolet Catastrophe