AutoSave OFF w- Lab 12 Young's Experiment(1) - Saved to my Mac Q Home Insert Draw Design Layout References Mailings Review View ? Tell me Share Comments Calibri (Bo... v 12 AD EEVEEVEE AaBbCcDdEe AaBbCcDdEe AaBbCcDc AaBbCcDdE AaBb( AaBbCCDdEE Paste BIUvab X X A DAY Norma No Spacing Heading 1 Heading 2 Title Subtitle Styles Dictate Sensitivity Pane Purpose Perform Young's experiment in a simulated environment in order to determine the wavelength of light. Positions of bright fringes for double-slit interference at screen distance L mal ym = - where m = 0, 1, 2 , 3, .... ym - position of the m-th bright fringe on the screen, in m 1 - wavelength, in m L - distance between the double slit and the screen, in m d - spacing between the two slits, in m m - fringe number Wavelength intervals Red: 635 - 700 nm Green: 520 - 560 nm Blue: 450 - 490 nm Background You will analyze a two-point source light interference pattern that is projected onto a screen. The interface is divided into three important sections. The top section represents the experimental set-up as it would be seen from above. The set-up consists of a laser beam of unknown wavelength, a double slit, a screen upon which the interference pattern is projected. Tap the laser to change the wavelength; tap the double slit to change the slit separation distance; drag the screen to move it towards and away from the double slit. Tap Me Drag Me Page 1 of 4 719 words English (United States) Focus E + 102%Autosave n 5 Experiment( Home Insert Draw [Cqu Pt [B 858 6 Calibri (Bo... @I QV-abxzx' Design Layout v v AA AV Aav References Mailings Review View Q Tellme AaBchDdEe AaEchDdEe AaBbCCD( AaBchDdEt AaBb( AaBchDdEt > M I V Normal No Spacing Heading 1 Heading 2 The middle section represents the front view of the screen. This view allows you to see the actual Interference pattern conslstlng of bright and dark bands. These bands are the result of the wave interference of the waves for the waves diffracting through the two slits. The cm-ruler can be used to measure the distance between bright bands on the interference pattern. The bottom section allows you to enter your answers for the wavelength of light for the three different lasers. Once you have measured values of y. d.m. and L, you can calculate the wavelength of light in nanometers and select the answer using the slider. Once you have determined the wavelength of all three laser beams, a Check Answer button is available. Click the button to check your answers. Procedure Go to: httbs://www.ohvsicsclassroom.com/thsicsInteractives/Lieht-a nd~ColorlYounes~ ExperimentlyoungsExgeriment-lnteractive After launching the Interactive and resizing it to your liking, gain familiarity with all the interface controls. Then begin the Conceptual and Mathematical Analysis questions. Conceptual Analysis 1. Drag the screen closer and further from the card with the two slits. This changes the value of L. Observe the changes in the pattern that is projected onto the screen. Complete the following: As the screen is moved further from the slits, the distance between bright bands (increases, decreases, remains the same). As the screen is moved closer to the slits, the distance between bright bands (increases, decreases. remains the same). The band separation distance (y) and the slit-to-screen distance (L) are (directly, inversely) related. (3 Share Cl Comments Sensitivity Title Subtitle Styles Dictate Pane Page 2 of 4 719 words [1:7 English (United States) _ V + 102% Focus n Fig Autosave Home Insert Draw Design Layout References Mailings Review View Q Tell me (ashare Cleomments [on V X ca'ibmmm V 12 " AA AV Aa" A0 ' AaBchDdEe AaEchDdEe AaBchDr AaBchDdEt A Bbl \"FWD\"! L I " F V [E] a > i Paste 6 E I g , ab x2 x A v I v A ., Normal NoSpacIng Headlng1 Headlngz Tltle Subtitle egg/L25 Dictate Sensltlvlty 2, Change the color of the light by tapping on the laser. Each color is characterized by a unique wavelength; red is longest, and blue is shortest. Observe the changes in the pattern that is projected onto the screen. Complete the following: As the wavelength is increased, the distance between bright bands (increases, decreases. remains the same). As the wavelength is decreased, the distance between bright bands (increases, decreases. remains the same). The band separation distance (y) and the wavelength (A) are (directly, inversely) related. 3. Use the pull-down menu for Slit Separation Distance to investigate the effect of changing the distance between slits. Observe the changes in the pattern which is projected onto the screen. Complete the follawlng sentences: As the slit separation distance is increased. the distance between bright bands (Increases, decreases, remains the same). As the slit separation distance is decreased, the distance between bright bands (increases, decreases. remains the same). The band separation distance (y) and the slit separation distance (d) are (directly, inversely) related. Mathematical Analysis 4, Make on-screen measurements ofthe appropriate values and determine the wavelength of light for each of the three laser colors. Record your data (in meters) in the Data Table. Show your calculations for the first two rows. Use the sliders to select your answer (in nanometers). 5. Once you have selected the answers for all three laser wavelengths a Check Answer button appears. Tap the button and view the feedback. If incorrect, then check your work and correct it and try again (up to three tries). when all three are correct, take a screenshut and include in your lab report. Page 3 of 4 719 words II' English (United States) . AutoSave OFF w- Lab 12 Young's Experiment(1) - Saved to my Mac Q Home Insert Draw Design Layout References Mailings Review View ? Tell me Share Comments Calibri (Bo... v 12 A A Aa A AaBbCcDdEe AaBbCcDdEe AaBbCcDc AaBbCcDdE AaBb( AaBbCCDdEE Paste BIUvab X X A DAY Norma No Spacing Heading 1 Heading 2 Title Subtitle Styles Dictate Sensitivity Pane Data Sheet: Young's Experiment Laser y (m) m d (m) L (m) (nm) Red Green Blue Page 4 of 4 719 words English (United States) Focus + 102%