A film waveguide (nf=2.20) is deposited on a substrate with ns=1.50 to form a slab waveguide. The guide is operated in air and TE modes excited with a laser with 1300 nm wavelength. Find the maximum thickness that allows only 3 modes to propagate.

Fluids at rest possess no flow energy. a)- true b)- false

A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?

Oxygen at 300 kpa and 400 k is in a closed system with an initial volume of 0.1 m3. is now compressed in a polytropic process, with exponent of n 1.2, to a temperature of 500 k. calculate: a) the boundary work done during the compression, in kj b) the heat transfer during the compression, in kj