Which of the following statements are true statements about Thomas Young's experiment? Young's experiment provided evidence that light exhibits particle-like behavior. Young's experiment depends upon the use of white light from two sources. The two sources of light in Young's experiment could be two different light bulbs. For Young's equation to be geometrically valid, the distance from the sources to the screen must be much greater than the slit separation distance. For Young's equation to be geometrically valid, the wavelength of the light must be much greater than the slit separation distance. Thomas Young measured the distance from an antinodal point (of known number) to each of the two sources, computed a path difference and calculated the wavelength of light. Thomas Young was able to determine the wavelength of a light wave.

Which of the steps is not needed to determine whether the Bragg condition is fulfilled? All of these steps are necessary O Calculate their respective interplanar distances O Calculate the angle 0 for all the set of lattice planes Index all the set of lattice planes that can fulfill the condition O Determine whether the Bragg condition is fulfilled knowing the wavelength of X-rays

Question 1: X-ray Diffraction x-ray diffraction is a method used to identify different types of materials. While this is usually quite a complex process, however for a simple cubic structure, as seen below, we can find the distance between neighboring atoms. The below image shows the diffraction of x-rays passing through a cubic structure and illustrates a change in distance of 2d sine Light rays in phase ● a /I\ 100 20. b d sin 8 2d sin 0 Atoms in crystal If the wavelength of the x-ray is equal to an integer multiple of this change in distance, we will get constructive interference: mλ = 2d sine X-rays of wavelength 0.103 nm reflects off a crystal and a second-order maximum is recorded at a Bragg angle of 25.5°. (a) What is the spacing between the scattering planes in this crystal? (b) At what angle will the third-order maximum occur?

Circle and correct the statements below that are false about diffraction. Justify your corrections. (a)  Diffraction of light is evidence that we can treat light as a particle. (b)  For single slit diffraction, constructive interference of light will present as dark spots on screen. (c)  For single slit diffraction, as the wavelength of the light decreases, the diffraction pattern shrinks with all fringes getting narrower. (d)  When λ/w is large in this scenario [λ >> w], there are little to no effects of diffraction observed. (e)  All of the above statements are true.