Special Relativity

A rocket leaves Earth and travels to a star that is 20 light years (one light year equals 9.46E15 meters) as seen by the Earth. The speed of the rocket is 0.8c relative to the Earth. The time for the trip as measured on by the astronauts in the spaceship is

• 25 years

• 20 years

• 15 years

• 12 years

A rocket leaves Earth and travels to a star that is 20 light years (one light year equals 9.46E15 meters) as seen by the Earth. The speed of the rocket is 0.8c relative to the Earth.  The distance from Earth to the star as measured by the astronauts is 

• 25 light years
• 20 light years
• 16 light years
• 12 light years

Which of the following statements is not true according to the theory of relativity? 

• As an object increases speed its mass increases. 
• As an object increases speed its length increases. 
• As an object increases speed its kinetic energy increases. 
• As an object increases speed its momentum increases. 

Compared to clocks in a stationary reference frame moving clocks run 

• faster
• slower
• at the same rate

When you approach a light source, the light from that source has a speed 

• greater than c. 
• less than c. 
• equal to c.
  

Tags

NGSS.HS-PS4-1

We do not usually observe relativistic effects in our daily lives because 

• we are moving at speeds much less than c. 
• we are much larger than atoms. 
• we are much heavier than elementary particles. 
• we are much lighter than stars. 

Ignore the rotation of the earth. Which clock ticks more slowly? Hint: Movie Interstellar - Black Holes

• The one on the top of a mountain. 
• The one at the bottom of that same mountain.
  
• They tick at the same rate.
  
• Cannot be determined from the information given. 

Who was the creator of a special theory of relativity? It showed calculations of time and motion.

• Albert Einstein
• Hitler
• Nazis

As an object approaches the speed of light, time for that object speeds up, and it ages more quickly.

• True
• False

What does the relativity of simultaneity say?

• Two events may occur at the same time in one reference frame, but not another.
• If two events occur at the same time in one reference frame, they will occur at the same time in all reference frames.