What is the period of a clock waveform whose frequently is 4 MHz?

The period of a waveform is the reciprocal of its frequency. To find the period (T) in seconds, you can use the formula ( T = \frac{1}{f} ), where ( f ) is the frequency in hertz. For a frequency of 4 MHz (4,000,000 Hz), the period is ( T = \frac{1}{4,000,000} ) seconds, which equals 250 nanoseconds (ns). Therefore, the period of a 4 MHz clock waveform is 250 ns.