Light is emitted when an electron

A) is boosted to a higher energy level.
B) makes a transition to a lower energy level.
C) accelerates to a medium energy level.
D) none of the above


Answer: B

Physics & Space Science

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What will be an ideal response?

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The cosmic microwave background is almost perfectly uniform in all directions, except for very small deviations in its temperature. What do scientists think these small deviations represent?

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Indicate whether the statement is true or false

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