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Chapter 16: Q10PE (page 590)

A stroboscope is set to flash every 8 x 10-5 s. What is the frequency of the flashes?

Short Answer

Expert verified

The frequency of the flashes is 12500 Hz.

Step by step solution

01

Identification of the given data

The time period of the stroboscope is, T = 8 x 10-5 s

02

Expression for frequency

The expression for the frequency depends on the time period of the event and it is given as follows,

\({\bf{f = }}\frac{{\bf{1}}}{{\bf{T}}}\)

Here, T is the time period.

03

Determination of frequency

Substitute all the values in the above expression.

\[\begin{aligned}f &= \frac{1}{{8 \times {{10}^{ - 5}}\;{\rm{s}}}}\\ &= 12500\;{{\rm{s}}^{ - 1}} \times \frac{{1\;{\rm{Hz}}}}{{{{\rm{s}}^{ - 1}}}}\\ &= 12500\;{\rm{Hz}}\end{aligned}\]

Thus, the frequency is 12500 Hz.

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