The Andromeda Galaxy is faintly visible to the naked eye in the constellation Andromeda. Suppose instead it were located in the same direction in space as the center of the Milky Way Galaxy (but still at its current distance)
How would it appear to the eye in that case? A) We could not see it at all.
B) It would look about the same, but would be in the constellation Sagittarius instead of Andromeda.
C) It would be much brighter, because it would be illuminated by the many stars in the center of our galaxy.
D) It would look about the same, but it would be harder to pick out because its cloud-like appearance would make it blend in with the cloud-like appearance of the Milky Way in our sky.
A
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A spaceship is moving past you at a speed close to the speed of light. If you could somehow watch the people inside it over a long period of time, what would you conclude?
A) They are aging more slowly than you. B) They are aging more rapidly than you. C) Their mechanical clocks go slower than yours, but the people are aging at the same rate as you. D) Their time is the same as your time.
X-rays with an energy of 400 keV undergo Compton scattering from a target. The scattered rays are deflected at an angle of 38° relative to the direction of the incident rays.What is the energy of the scattered x-rays?
a. 343 keV b. 300 keV c. 400 keV d. 2410 keV
The critical angle for an air-glass interface is 29.6°. When a light ray in air is incident on the interface, the reflected ray is 100% polarized. What is the angle of refraction of that ray?
A) 25.1° B) 24.5° C) 25.7° D) 23.9° E) 26.3°
In an inelastic collision, the total kinetic energy after the interaction can be greater than the initial kinetic energy
Indicate whether the statement is true or false