Holograms appear three dimensional because
A. they are in color.
B. they are transparent.
C. they consist of Young double slits.
D. they recreate wave fronts as if they came from the original source.
E. of their spectral response to refraction.
D. they recreate wave fronts as if they came from the original source.
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The celestial equator always crosses the horizon at the east point and west point
a. True b. False Indicate whether the statement is true or false
You are in a spaceship traveling away from earth. You and Mission Control on earth agree that the +x direction is the direction in which your ship is traveling relative to the earth. If you choose your own frame to be the Home Frame (so that the earth is the Other Frame), what is the sign of ?, according to the convention established in this chapter?
A. Positive B. Negative C. We are free to choose ? to have either sign.
The kinetic energy of a body is correctly given by which of the following expressions? (m=mass, v=speed)
A. mv2 B. mv C. (½)mv D. 2mv2 E. (½)mv2
Moving electric charges will interact with
A) an electric field. B) a magnetic field. C) both of these D) none of the above