8. Two spaceships are heading towards each other with speeds of 0.56. One ship shines a laser beam at the other. How will each ship see the light? Both will see the light travel at 0.56. Both will see the light travel at 6. One ship will see the light at 1.56, the other will see the light travel at 0.56. Both will see the light travel at 0.756. E1957.\" 9. The following graph shows Millikan's data for 12w (V) determining the threshold frequency for a given material by varying the frequency of the incident 3 light. Which of the following will change the threshold frequency? 2 a. Use a different metal 1 b. Increase the light intensity 0. Increase the li tfre uenc 0 fix 10'41'12) dD' .gh.q.y 024\\6810I2 . eerease the light intensity . f = 4.39 X I0" H: e. Decrease the hght equency '3 10. If an astronaut who has only aged 3 years returns to Earth 15 years later, how fast was his ship travelling? a. 0.20 c b 0.45c c. 0.50 c d. 0.98c e 1.02 c Application Nearlypravide written responses 1 l. A car is moving at a rapid pace. It is approaching a garage with doors at either end. The proper length of the car is longer than the garage. As the car travels through the garage, describe what the driver would observe. Describe what would be seen by a stationary observer inside the garage. [3 marks]