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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Two objects, one less massive than the other, collide elastically and bounce back after the collision. If the two originally had velocities that were equal in size but opposite in direction, then which one will be moving faster after the collision?
a. The less massive one. b. The more massive one. c. The speeds will be the same after the collision. d. There is no way to be sure without the actual masses.
According to two different estimates, coal reserves can be 250 Gt or 450 Gt, almost twice as much. Why is it so difficult to pin down the reserves' total?
What will be an ideal response?
The distribution of energy in the blackbody radiation depends upon the material from which the blackbody is constructed
Indicate whether the statement is true or false
A charge -q is far away from a charge -Q which is fixed in place. As -q moves closer to -Q, the work done by the electric field is
A. positive. B. negative. C. zero.