1.3 Relativity of Time Intervals 1.4 Relativity of Length 1.5 The Lorentz Transformation 1.6 Relativistic Momentum 1.7 Relativistic Work and Energy 1.8 Newton Mechanics and Relavitity 4.Teaching method Teaching:Group Discussion;Autodidacticism under the guidance of the teacher 5.Comments Carefully prepare lessons,prepare students and make preparations before class:In the teaching proce we pay attention to cultivating students' creative thinking, take students as the main body and emhance studentsse of participation:Corresponding exercises and supplementary exercises after class. Problems: 1.Suppose the two lightning bolts shown in Fig.37.5a are simultaneous to an observer on the train.Show that they are not simultaneous to an observer on the ground.Which lightning strike does the ground observer measure to come first? 2.A spaceship flies past Mars with a speed of 0.985c relative to the surface of the planet.Whe the spaceship is directly overhead,a signal light on the Martian surface blinks on and then off. An observer on Mars measures that the signal light was on for 75.0 us(a) Does the observer on Mars or the pilot on the spaceship measure the proper time?(b)What is the duration of the light pulse measured by the pilot of the spaceship? 3.A spacecraft of the Trade Federation flies past the planet Coruscant at a speed of 0.600c.A scientist on Coruscant measures the length of the moving spacecraft to be 74.0m.The spacecraft later lands on Coruscant,and the same scientist measures the length of the now stationary spacecraft.What value does she get? 4.A pursuit spacecraft from the planet Tatooine is attempting to catch up with a Trade Federation cruiser.As measured by an observer on Tatooine,the cruiser is traveling away from the planet with a speed of 0.600c.The pursuit1.3 Relativity of Time Intervals 1.4 Relativity of Length 1.5 The Lorentz Transformation 1.6 Relativistic Momentum 1.7 Relativistic Work and Energy 1.8 Newton Mechanics and Relavitity 4.Teaching method Teaching; Group Discussion; Autodidacticism under the guidance of the teacher 5.Comments Carefully prepare lessons, prepare students and make preparations before class; In the teaching process, we pay attention to cultivating students' creative thinking, take students as the main body and enhance students' sense of participation; Corresponding exercises and supplementary exercises after class. Problems： 1. Suppose the two lightning bolts shown in Fig. 37.5a are simultaneous to an observer on the train. Show that they are not simultaneous to an observer on the ground. Which lightning strike does the ground observer measure to come first? 2. A spaceship flies past Mars with a speed of 0.985c relative to the surface of the planet. When the spaceship is directly overhead, a signal light on the Martian surface blinks on and then off. An observer on Mars measures that the signal light was on for 75.0 μs(a) Does the observer on Mars or the pilot on the spaceship measure the proper time? (b) What is the duration of the light pulse measured by the pilot of the spaceship? 3. A spacecraft of the Trade Federation flies past the planet Coruscant at a speed of 0.600c. A scientist on Coruscant measures the length of the moving spacecraft to be 74.0m. The spacecraft later lands on Coruscant, and the same scientist measures the length of the now stationary spacecraft. What value does she get? 4. A pursuit spacecraft from the planet Tatooine is attempting to catch up with a Trade Federation cruiser. As measured by an observer on Tatooine, the cruiser is traveling away from the planet with a speed of 0.600c. The pursuit