Bohr's quantum condition was
A)
angular momentum is quantized.
B)
energy is exchanged when changing state.
C)
a photon is emitted as a quantum of energy
D)
electron orbits are stationary states.
E)
none of the above.
A
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Indicate whether the statement is true or false
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A) being a fragment from Comet Halley. B) being a fragment from the surface of Mars. C) being a fragment from the surface of the Moon. D) being a fragment of a shattered asteroid.
A laser beam passes through a thin slit. When the pattern is viewed on a screen 1.25 m past the slit, you observe that the fifth-order dark fringes occur at ±2.41 cm from the central bright fringe
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A boy standing at one end of a floating raft that is stationary relative to the shore walks to the opposite end of the raft, away from the shore. As a consequence, the raft (Hint: use conservation of momentum.)
1.remains stationary. 2.moves away from the shore. 3.moves toward the shore.