Chapter 27, Problem 50A

To determine

The number of cycles the wave train contains is to be determined on the bases of given information.

Answer to Problem 50A

The number of cycles is ${\text{1×10}}^{\text{10}}\text{cycles}$ .

Explanation of Solution

Given info:

Wavelength of light = $\text{450}\text{nm}$

Time period = ${\text{1×10}}^{\text{-10}}\text{}\text{sec}$

Formula used:

The frequency or cycles per second equals to the reciprocal of the time period such as

  $f=\frac{1}{t}$

Calculation:

Now substitute the value of time period in the formula

  $\begin{array}{l}f=\frac{1}{1\times {10}^{-10}}\\ =1.0\times {10}^{10}cycles\end{array}$

Conclusion:

The complete cycles are $1.0\times {10}^{10}cycles$ .