A spaceship is observed by a stationary observer to be moving at 0.600 c. A laser beam is shown straight ahead from the front of the spaceship. How fast does the laser beam travel relative to the observer?
A. 1.60 c
B. 1.36 c
C. 1.00 c
D. 0.640 c
E. 0.360 c
C. 1.00 c
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Which of the following stars is hottest?
A. G B. F C. M D. O E. B
Time Dilation: You are a passenger on a spaceship. As the speed of the spaceship increases, you will observe
A. your watch slowing down. B. your watch speeding up. C. your watch losing time. D. your watch gaining time. E. nothing unusual about the behavior of your watch.
Light rays from a distant source __________________, assuming the light does not pass through any cloud-like nebulae
a. are perpendicular b. focus to an image c. focus to a point d. are parallel
Imagine a planet like Earth orbiting the Sun, at an average distance of 1 AU but with a highly eccentric orbit. Which of the following statements about this orbit is not true?
A) The period is longer than a year. B) The seasons are very extreme. C) The planet is sometimes very close to the Sun, and sometimes very far. D) The planet does not maintain a constant speed around the Sun.