Answer to Question #285941 in Physics for Ella

Question

1. Which of the following describes the speed of light according to the Special Relativity Theory?

A The speed of light is constant.

B. The light speed depends on the speed of the observer.

C The speed of light depends on the source.

D. The speed of light is infinite

2. One of two identical twins became an astronaut, while the other worked at PAGASA. The astronaut had a journey to a nearby star and has been gone for several years. Upon the astronauts return, the twins reunite and observe their physical appearances. The result will be that

A. The astronaut has aged less

B. The one working in PAGASA has aged less

C. Both have aged the same

D. None of the above

3 A man on the ground sees a rocket moving past him at 99% the speed of light. Compared to when the rocket is at rest, the man measures the length as:

A. Longer

B. Shorter

C. The same length

D. None of the above

Answer 1

1A

2A

3B