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what is the conditions for a laser to be totally lunched
into the fiber optic.
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- A low-power laser used in a physics lab might have apower of 0.50 mW and a beam diameter of 3.0 mm. Calculate (a) the average light intensity of the laser beam, and(b) compare it to the intensity of a lightbulb producing100-W light viewed from 2.0 m.(material science question) The unit cell dimension of fcc copper is 0.36 nm. Calculate the longest wavelength of X-rays which will produce diffraction from the (100), (110) and (111) planes. Which of these are missing orders? From what planes would X-rays of wavelength 0.5 nm be diffracted?Question 4 te p rieipee Adleet yret haslieparatm divtance ol 0.de mm. The fint height fringe ppcas S mm aluve the middle of the central hright fimer, when the alita are ithamatef with a laner of wavelength S12 n. What in the dstance to the sTEn from the slitu? O 0,65 m O n45 m O 0.77 m O 1.12 m O 0.56 m
- can you answer number 4?What is the type of emission for a crystal transmits an E.M wave with 1GHz at room temperature?In modern-day simulation of the interference of light, laser is commonly usedas a light source. All of the following are characteristics of laser, EXCEPT a. its light is coherentb. its light is monochromaticc. its light beam is very narrowd. its light can travel in vacuum
- An X-ray scattering experiment is performed on a crystal whose atoms form planes separated by 0.440 nm. Using an X-ray source of wavelength 0.548 nm, what is the angle (with respect to the planes in question) at which the experimenter needs to illuminate the crystal in order to observe a first-order maximum?The distance between atoms in a molecule is about 10-8 cm . Can visible light be used to “see” molecules?What minimum frequency of light is needed to ejectelectrons from a metal whose work function is 4.8 x10-19 J ?
- How many photons per second are emitted by a 7.50 mW CO2 laser that has a wavelength of 10.6 mm?True FalseThe sun's radiation is most intense in the visible region. True False Radio waves travel in vacuum at a lower speed than the visible light. True False X-rays can be produced in transitions involving inner electrons in an atom. True False A vertical automobile antenna is sensitive to electric fields polarized vertically. True False Visible light is often emitted when valence electrons change their state. True False Gamma rays can be produced in transitions of an atomic nucleus from one state to another. True False The Earth's atmosphere is quite transparent to infrared radiation.A mode-locked laser has a linewidth of 100nm at a center wavelength 1050nm. Assume the pulse shape is hyberbolic secant and it is transform limited. What is the pulse width (in fs)? (round all answers to 1 sig. fig. after decimal point) a.116.0 b.11.6 c.5.8 d.58.0 e.100.0