Fireworks Go Off at the Same Time According to Earth

question 17

Multiple Choice

Fireworks go off at the same time according to Earth clocks in two cities, Alum and Boron, that are 300 km apart. The people in a spaceship that is flying in a straight line from Alum to Boron at 0.80 c also observe the fireworks. Do they see the fireworks in the two cities simultaneously? If the people in the spaceship say the fireworks were not simultaneous in Alum and Boron, how long before or after the fireworks flashed at Alum did the fireworks flash at Boron according to their calculations? (The spaceship is directly over Alum when the fireworks flash.)

• A) Yes; 0
• B) Before; 1.0 × 10−³ s
• C) After; 1.0 × 10−³ s
• D) Before; 1.3 × 10−³ s
• E) After; 1.3 × 10−³ s

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