Part A: Multiple Choices. Write the best answer for each question. Answer all qu
ID: 3307668 • Letter: P
Question
Part A: Multiple Choices. Write the best answer for each question. Answer all questions in this section. [K-20] 1. You are in a windowless spacecraft. You 2. The Michelson-Morley experiment need to determine whether your spaceship is moving at constant nonzero velocity, or is at rest, in an inertial frame of Earth. established that: a) there is no observable ether wind at b) the ether moves at "c" as Earth c) the ether is an elastic solid that d) Earth does not move with respect to the surface of Earth. travels in its orbit. streams over Earth. the Sun a) You can succeed by making very precise time measurements. b) You can succeed by making very precise mass measurements c) You can succeed by making very precise length and time measurements. d) You cannot succeed no matter what you do 3. Simultaneity is: 4. A Klingon spaceship is approaching a) dilated b) absolute. c) invariant d) relative Earth at approximately 0.8c measured relative to Earth. The spaceship directs a laser beam forward directly through your physics classroom window. You measure the speed of this light to be: a) 0.2 c b) 0.8 c c) 1.0 c d) 1.8 c 5. The proper time between events Et and6. A clock, designed to tick each second, is moving past you at a uniform speed. You find the moving clock to be: E2 a) the time measured on clocks at rest b) the time measured on clocks at rest is : a) ticking slowly b) ticking quickly. c) accurate d) running backward. with respect to Et and E2 in an inertial system moving properly with respect to E1 and E2 c) the time measured on clocks moving uniformly with respect to Et and E2. d) the time between E, and E2 as measured by a clock in a national- standard laboratory, such as the National Research Council in Ottawa. SPH4U-Quantum Mechanics and Special RelativityExplanation / Answer
1) option (d): two inertial frames are equivalent.
2)option (a): no fringe shift in the Michelson- Morley experiment dictates that there is no ether.
3) option (d): " Relativity of Simultaneity"
4) option (c): the speed of light in vacuum is a universal constant.
5) option (a): definition.
6) option (a): " Time Dilation"