18.3 Relativity and Speed of Light Quiz

What does the theory of relativity help observers agree on?

• The exact size of objects

• The color of objects

• What they see from different perspectives

• The weight of objects

What is the approximate speed of light used for easier calculations?

• 150,000 km/sec

• 200,000 km/sec

• 300,000 km/sec

• 400,000 km/sec

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How does light travel according to observations and experiments?

• At varying speeds depending on the observer

• At the same velocity regardless of the observer's perspective

• Faster when moving towards the observer

• Slower when moving away from the observer

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What is the speed of light in miles per second?

• 100,000 miles per second

• 186,283 miles per second

• 250,000 miles per second

• 299,792 miles per second

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In the example given, what is the speed of light relative to the spaceship?

• 0 km/sec

• 150,000 km/sec

• 250,000 km/sec

• 300,000 km/sec

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What does classical relativity suggest about all motion?

• All motion is absolute

• All motion is relative to the observer's state of motion

• All motion is faster than the speed of light

• All motion is slower than the speed of light

What is the speed of light relative to a fast-moving spaceship or a stationary point?

• 50,000 km/sec

• 250,000 km/sec

• 300,000 km/sec

• 500,000 km/sec

How do different observers agree on the speed of light?

• By measuring different speeds

• By agreeing on distance and time

• By disagreeing on distance and time

• By using different formulas

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What is the significance of the formula s = d / t in understanding speed?

• It shows speed is independent of distance

• It relates speed to distance and time

• It shows speed is constant

• It relates speed to acceleration

What does the text imply about the speed of light in different frames of reference?

• It varies with the frame of reference

• It remains constant across all frames

• It is faster in moving frames

• It is slower in stationary frames

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