The flash from a camera is an example of a continuous wave.
Added by Roger J.
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A continuous wave is a wave that continues without interruption, maintaining a consistent frequency and amplitude over time. Show more…
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true or false: the flash from a camera is an example of a continuous wave.
Eduard S.
If a laser pulse is of short enough duration, it becomes rather superfluous to refer to its specific color. How shown a duration must a light pulse be for its range of frequencies to cover the entire visible spectrum? (The visible spectrum covers frequencies of $-4.5$ to $\left.7.5 \times 10^{14} \mathrm{~Hz} .\right)$
Laser pulses of femtosecond duration can be produced, but for such brief pulses it makes no sense to speak of the pulse's color. To demonstrate this, compute the time duration of a laser pulse whose range of frequencies covers the entire visible spectrum $\left(4.0 \times 10^{14} \mathrm{~Hz}\right.$ to $\left.7.5 \times 10^{14} \mathrm{~Hz}\right)$
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