What is frequency? What is wavelength? Calculate the frequency of signals with wavelengths of 40 m, 5 m, and 8 cm. A commonly used frequency range is 902 to 928 MHz. Compute the bandwidth of this frequency range? Classify the following applications of electronic communications as simplex (one-way) or duplex (two-way). [Research Question] Solution Answer : 1.What is frequency ? Answer : 1.The number of cycles per unit of time is called frequency. 2.Frequency is measured in the Hertz units(Hz) 3.Frequency related the number of waves that pass a fixed place in a given amount of time. .............. 2.What is Wavelength ? Answer : 1.Wavelength is the Distance Between the identical points of two consecutive waves. 2.It represented by Greek letter (lambda) 3.Usually it is measured in meters. 4. =v/f where v=speed & f=frequency .....................