Question

Question: Diffraction of wave.   Please explain in detailed how to do this kind of problem(prob 9)

last first 4 pts) Parallel wavefronts are incident on a slit of width a, as shown. Consider the six wavelets going at an angle θ. The path length difference of the wavelet pair (1, 4) is 1/2. Do the wavelets cause a bright fringe, dark fringe, or neither on a screen a distance L away, where L is much larger than d? 2 A bright fringe. A dark fringe. Neither. A. B) Use the following situation for the next three problems. An x-ray beam of wavelength1.4 x 10-10 m makes an angle of 20 with a set of planes in a crystal (the Bragg angle) causing first order constructive interference.20 10) (5 pts) At what Bragg angle will the second order line appear? A. 10 20l 40° D 43 E. There will not be a second order line. 11) (4 pts) What is the energy of each x-ray photon? A. 9.3 x 10-44J F-h B. 6.6 x 10-34J C. 4.7 x 10-24 J

Answer 1

Q97 Ak Path oliference between wavelets dlark frin 2- Comce and 3 Lo forsecend order