Special Relativity Physics Presentation Quiz UTP

The difference in age for the twins in the Twin Paradox occurs during which key moment in the trip?

• None of these

• During the beginning of the journey traveling fast.

• While approaching a black hole in space during the trip.

• During the time returning to Earth traveling fast.

• During the period of great acceleration during the changing of directions and return to Earth.

A rocket of length 5 meters passes an observer on earth. The observer measures the passing rocket to be 3 meters long. What is the velocity of the rocket in the reference frame of the Earth-based observer?

• 1.25c

• 0.8c

• 0.6c

• 0.4c

• 0.75c

Which of the following statements about special relativity is FALSE?

• An assumption of special relativity is that the laws of physics are the same in all reference frames.

• An assumption of special relativity is that the speed of light is the same in all reference frames.

• Special relativity says that space and time are part of the same thing: spacetime.

• An assumption of special relativity is that the laws of the physics are the same in all 'constant velocity' reference frames.

Which of the following are consequences of special relativity?

• Moving objects look shorter in length (thinner) than stationary objects.

• Time moves at a different rate for objects moving relative to each other.

• Mass and energy are the same thing. If you increase an object's energy, you also increases its mass.

• Nothing is certain; everything is relative.

In the train thought experiment, two beams of light are fired from the center of a moving train car: one beam of light towards the front of the train and one towards the back. From the perspective of a person on the side of the tracks, watching the train, which beam of light reaches the edge of the train car first?

• They arrive at the same time.

• The beam going towards the front of the train car.

• Neither, the light stays where it is.

• The beam going towards the back of the train car.

Relative to a stationary observer, a moving clock

As the velocity of your spaceship increases, you would observe ______

• That your precision clock runs slower than normal.

• That the length of your spaceship has decreased.

• That your mass has increased.

• All of the given answers

• None of the given answers

The speed of light (c) =

• 3 x 10⁸ miles/hour

• 3 x 10⁸ meters/second

• 3 x 10⁸ kilometers/hour

• none of these

What are the two postulates of Special Relativity?

• that the speed of light c is a constant, independent of the relative motion of the source.

• the speed of light is different in all reference frames

• the laws of physics are the same and can be stated in their simplest form in all inertial frames of reference.

• the speed of light is 3 x 10⁸ meters/second