Question

2. Suppose your instructor uses a red helium-neon laser ( 632.8 nm in air) to illuminate two parallel vertical slits much narrower than their separation distance, so ignore any single-slit diff metal foil. The very narrow slits are spaced 0.10 mm apart. (Assume that the slits themselves are raction effects that would result from each slit individually.) a.(3 pts.) If the central (0th-order) maximumn is located at&-o., what is the angular position θ, in degrees, of the T'"-order, 2 -order, and 3-order maxima? You do NOT need to show your work for this part Be sure to include units and appropriate significant figures! b. (8 pts) The same diffraction pattern is displayed horizontally on a distant wall, 8.0 m away from the slits. Suppose the x-axis runs horizontally along the distant wall, and the origin of the x-axis (x 0) is located at the central (o" -order) maximum. What is the position x of the I'-order, 2nd-order, and 3 d-order maxima? You do NOT need to show your work for this part. Be sure to include units and appropriate significant figures c. (2 pts.) Graph the intensity of the diffraction pattern on the wall, as a function of position x, spanning the range 20 <r<+20 cm. Omit numerical values and units for intensity (vertical axis), but be precise with the pattern's horizontal positions along the x-axis. LABEL all maxima with their order numbers, m. (This graph should agree with your answers to part (b) above!) x [cml -20 -8 16 20 d. (1 pt.) If the separation between the two slits became 4 times greater, the spacing between adjacent bright maxima on the wall would become approximately... A. 16 times larger B. 4 times larger C. 2 times larger D. unchanged E. 2 times smaller F. 4 times smaller G. 16 times smaller e. (1 pt.) Let the two slits be labeled A and B. The physical distance from slit A to the location of the 3d-order maximum on the wall is how much longer (or shorter) than the distance from slit B to the same point on the wall? D. 3.52 B. 2.5 C. 3λ F. 6λ

Answer 1

please rate it up thanks :)