A laser beam of wavelength 710 nmnm shines through a diffraction grating that has 750 lines/mm/mm and observed on a screen 1.4 mm behind the grating. For the steps and strategies involved in solving a similar problem, you may view a Video Tutor Solution.     Part A Part complete  How many bright fringes can be observed on a screen? Express your answer as an integer. Number of bright fringes = 3   SubmitPrevious Answers  Correct Part B What is the distance between m� = 0 and m� = 1 bright fringes?

1. O -12 points SerPSE9 38.P.001.MI.FB. My Notes O Ask Your Teacher Light of wavelength 588.0 nm illuminates a slit of width 0.80 mm. (a) At what distance from the slit should a screen be placed if the first minimum in the diffraction pattern is to be 0.89 mm from the central maximum? m (b) Calculate the width of the central maximum. mm Need Help? Read It Master It 2. O -11 points SerPSE9 38.P.005. My Notes + Ask Your Teacher Coherent microwaves of wavelength 5.00 cm enter a tall, narrow window in a building otherwise essentially opaque to the microwaves. If the window is 45.0 cm wide, what is the distance from the central maximum to the first-order minimum along a wall 6.50 m from the window? cm Need Help? Read It 3. -/1 points SerPSE9 38.P.007.MI.FB. My Notes Ask Your Teacher A screen is placed 60.0 cm from a single slit, which is illuminated with light of wavelength 690 nm. If the distance between the first and third minima in the diffraction pattern is 3.10 mm, what is the width of…

In a Young's double-slit experiment, 550-nm-wavelength light is sent through the slits. The intensity at an angle of 2.00⁰ from the central bright fringe is 84% of the maximum intensity on the screen. What is the spacing between the slits? 1.18e-6 x Your response differs from the correct answer by more than 10%. Double check your calculations. m

A red laser (λ = 692 nm) is incident on a diffraction grating that has n = 1500 lines per cm. Randomized Variablesλ = 692 nm n = 1500 lines/cm Part a) What is the angle, in radians, that the first order maximum makes, θ1?  part b)  What is the angle of the fourth order maximum, θ4, in radians?

Laser light of wavelength 529 nm is incident on a circular aperture which has a diameter of 0.095 mm. A diffraction pattern is observed on a screen which is placed 78 cm from the aperture. Give your answer to at least three significant figures. Answer must be accurate to 1%. L What is the diffraction angle, 0, of the first diffraction minimum? degrees Submit Answer Incorrect. Tries 3/20 Previous Tries What is the distance, on the screen, from the center of the central bright spot to the first dark ring? cm Submit Answer Tries 0/20

Narrow, equally spaced vertical slits with equal widths are located at a distance of D = 2.47 m from a screen. The intensity pattern in the figure is observed when light with wavelength = 570 nm from a laser passes through the slits, illuminating them uniformly. The screen is perpendicular to the laser beam. 0 1 2 3 4 5 6 7 8 9 cm 7 The number of slits is ... Submit Answer Incorrect. Tries 1/3 Previous Tries Calculate the center to center spacing between the slits. Use the cm scale to measure distances on the screen. 2.25x10^-6 cm There is a fixed relation between wavelength, slit separation, and angle between the first (or second, third etc) order maximum and the central maximum. The angle can be determined from the distance to the screen and the separation between the first maximum and the central maximum on the screen. Submit Answer Incorrect. Tries 1/12 Previous Tries Calculate the width of the slits. Use the cm scale to measure distances on the screen. Submit Answer Tries 0/12

A physician wants to shine a therapeutic Nd YAG laser through a small slit onto a patient who is 37 cm behind the slit. What maximum size slit could she use so that there would be no intensity minima in the light that falls on the patient? The infrared wavelength of the YAG laser is 1064 nm.  PLEASE PLEASE draw the diagram/situation and define variables  THank you!!

The signature of an unknown element has a unique green color (550nm) in its emission spectra. You grabbed 4 sets of diffraction grating that would let you see this color. As you shine a light towards the element and into the diffraction grating, the color you expected appears at an angle of 20°. If the color is from a second-order spectra, which one did you use? a. 620 slits/mm grating b. 311 slits/mm grating c. 207 slits/mm grating d. 155 slits/mm grating

Question 2 A beam of monochromatic light with a wavelength of 500 nm is directed through an absorber having 5 equally narrow slits separated by 20 µm between adjacent slits. The resulting diffraction pattern is observed on a screen that is perpendicular to the direction of light and 5 m from the slits. The intensity of the central maximum is 1 3 W/m2. Calculate the intensity of the central maximum if there are only 4 equally narrow slits, separated by 20 um between adjacent slits? OA.0.832 W/m2 B. 1.994 W/m2 OC.3.234 W/m2 O D.4.902 W/m2 O E. 5 332 W/m2

Question Three Two aluminium samples, A and B, are to be examined using Bragg reflection. For sample A the first-order Bragg reflection from (111) planes occurs at an angle of 25°00', while for sample B the first order Bragg reflection from (111) planes was at 25°20'. Aluminium atoms are 1.8 x 10-10 m diameter and form an FCC structure. X-radiation of wavelength 1.52 x 10-10 m is used for the analysis of two samples of aluminium. Answer the following questions: (i) Calculate the lattice parameter of an aluminium atom. (ii) Calculate the interplanar distances for the two samples. (ii) Which sample shows pure aluminium, and what is the reason for the difference? (iv) Mention four uses of pure aluminium.