Compute the number of modes that will be supported by a fibre with core diameter of 20mm, a core refractive index of 1.5 and a cladding index of 1.48 if it is excited by light of frequency 0.25MHz.

What is the maximum wet film thickness (mils) for Sherwin-Williams B67R5? O a. 6.0 O b. 150.0 O c. 225.0 O d. 9.0 J

Unless specified otherwise, use the free space propagation speed of light 3x108 m/s to calculate the propagation delay. For numerical calculations, the results must show the appropriate unit. Show a complete solution for each problem4. A digital audio broadcast service is used to transmit digital music. Stereo audio signals are to be transmitted using a digital modem over a data link. A stereo signal uses two channels. In each channel, an audio signal is sampled at a rate of 44 kilo samples/second and quantised using a 24-bit quantiser. The data link has a transmission bandwidth of 0.5 MHz. Assume a 46-byte overhead is added to each packet before transmission.a. What is the total bit rate produced by a stereo audio signal?b. What is the minimum SNR value (in dB) required for the above data link?c. Assume that the broadcast service uses the UDP/IP/Ethernet protocol to transmit digital audio, using a packet switched network. The maximum packet size is limited to 800 bytes, which includes…

Question 15 A change in the mode field diameter (MFD) results in a change in: signal velocity coating attenuation average gain cladding absorption does not changes with the wavelength Select the appropriate response Submit Response