Fiber bragg gratings a fiber bragg grating is written in a fiber (n=1.5) with a strength = 2em and length = 2 cm at 2=1550nm. a) what is the bandwidth of the grating in nm? b) what is the reflectivity (in %) and transmission (in db)? c) if this grating were written in birefringent fiber where the difference in refractive index for the two polarizations, an = 10, what is the separation in grating wavelengths for the two polarizations? d) will this grating be any good for filtering unpolarized light?

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Abird sitting high in a tree is an example of what type of wnergy

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit