Pasco Scientific OS-8523 Скачать руководство пользователя страница 14 | Manualshive

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Pasco Scientific OS-8523 Скачать руководство пользователя страница 14

Slit Accessory

012-05880B

10

While the interference fringes are created by the interference of the light coming from the two
slits, there is also a diffraction effect occurring at each slit due to Single Slit diffraction. This
causes the envelope as seen in Figure 2.2.

Setup

➀

Set up the laser at one end of the optics bench and place the Multiple Slit Disk in its holder about
3 cm in front of the laser. See Figure 2.3.

➁

Cover the screen with a sheet of paper and attach it to the other end of the bench so that the paper
faces the laser.

➂

Select the double slit with 0.04 mm slit width and 0.25 mm slit separation by rotating the slit disk
until the desired double slit is centered in the slit holder. Adjust the position of the laser beam
from left-to-right and up-and-down until the beam is centered on the double slit.

Procedure

➀

Determine the distance from the slits to the screen.

Note that the slits are actually offset from the center line of the slit holder. Record the screen
position, slit position, and the difference between these (the slit-to-screen distance) in Table 2.1.

➁

Turn off the room lights and mark the positions of the maxima in the interference pattern on the
screen.

➂

Turn on the room lights and measure the distance between the first order (m = 1) marks and
record this distance in Table 2.1. Also measure the distance between the second order (m = 2)
marks and record in Table 2.1.

Table 2.1: Data and Results for the 0.04 mm/0.25 mm Double Slit

laser

screen

slit

Figure 2.3: Optics Bench Setup

Slit-to-screen distance (D) = _________________

First Order (m = 1)

Second Order (m = 2)

Distance between

side orders

Distance from center

to side (y)

Calculated slit

separation

% difference

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Содержание OS-8523

Страница 1: ...S PATTERNS L I N E S L I T C I R C U L A R A P E R T U R E S B A S I C O P T I C S S L I T A C C E S S O R Y 64 6 0 58 65 B D O U B L E S L I T S M U L T I P L E S L I T S COMPARISONS V A R I A B L E D O U B L E S L I T d s li t s e p a r at i o n in m m a s l i t w i d t h i n m m B A S I C O P T I C S S L I T A C C E S S O R Y O S 8 5 2 3 M U L T I P L E S L I T S E T 64 6 05 86 5 B SLIT ACCESSO...

Страница 2: ......

Страница 3: ...right Warranty and Equipment Return ii Introduction 1 Equipment 2 Assembly 3 Experiments Exp 1 Diffraction from a Single Slit 5 Exp 2 Interference from a Double Slit 9 Exp 3 Comparisons of Diffraction and Interference Patterns 13 Technical Support Inside Back Cover ...

Страница 4: ...packing of the equipment for return shipment will not be covered by the warranty Shipping costs for returning the equipment after repair will be paid by PASCO scientific Copyright Warranty and Equipment Return Please Feel free to duplicate this manual subject to the copyright restrictions below Credits Authors Ann Jon Hanks Editor Sunny Bishop Equipment Return Should the product have to be returne...

Страница 5: ... H E X E S S Q U A R E S a 0 02 t o 0 2 0 BASIC OPTICS SLIT ACCESSORY OS 8523 SINGLE SLIT SET a sl it w i d t h i n m m L I N E D I A L I N E S L I T C I R C U L A R 646 05865 Figure 1 Single Slit Disk NOTE Due to limitations of the photographic process used to produce the slit film the line and slit may not be exactly the same width The contents of the Multiple Slit Disk are See Figure 2 4 double...

Страница 6: ...L I T S M U L T I P L E S L I T S COMPARISONS V A R I A B L E D O U B L E S L I T d s li t s e p a r at i o n in m m a s l i t w i d t h i n m m B A S I C O P T I C S S L I T A C C E S S O R Y O S 8 5 2 3 M U L T I P L E S L I T S E T 64 6 05 86 5 B Equipment OS 8523 Slit Accessory Equipment The OS 8523 Slit Accessory includes the following Single Slit Disk Multiple Slit Disk lens holder with thum...

Страница 7: ... the vertical position the laser beam may not be large enough to illuminate both slits at the same time To align the laser beam and the slits place the Diode Laser OS 8525 at one end of the bench Place the slit holder on the optics bench a few centimeters from the laser with the disk side of the holder closest to the laser Figure 3 Slit Accessory and Lens Holder ring lens holder slit disk attachme...

Страница 8: ...4 Slit Accessory 012 05880B Notes ...

Страница 9: ...t the angle to the minima in the diffrac tion pattern is given by a sin θ mλ m 1 2 3 where a is the slit width θ is the angle from the cen ter of the pattern to the mth minimum λ is the wave length of the light and m is the order 1 for the first minimum 2 for the second minimum counting from the center out See Figure 1 1 Since the angles are usually small it can be assumed that sin θ tan θ From tr...

Страница 10: ...the slit to the screen Note that the slit is actually offset from the center line of the slit holder Record the screen position slit position and the difference between these the slit to screen distance in Table 1 1 Turn off the room lights and mark the positions of the minima in the diffraction pattern on the screen Turn on the room lights and measure the distance between the first order m 1 mark...

Страница 11: ...nter of the pat tern to the first and second order minima Record these values of y in Table 1 1 Using the average wavelength of the laser 670 nm for the Diode Laser calculate the slit width twice once using first order and once using second order Record the results in Table 1 1 Calculate the percent differences between the experimental slit widths and 0 04 mm Record in Table 1 1 Questions Does the...

Страница 12: ...Slit Accessory 012 05880B 8 Notes ...

Страница 13: ...terference pattern is given by d sinθ mλ m 0 1 2 3 where d is the slit separation θ is the angle from the center of the pattern to the mth maximum λ is the wavelength of the light and m is the order 0 for the central maximum 1 for the first side maximum 2 for the second side maximum counting from the center out See Figure 2 1 Since the angles are usually small it can be assumed that sin θ tan θ Fr...

Страница 14: ... from left to right and up and down until the beam is centered on the double slit Procedure Determine the distance from the slits to the screen Note that the slits are actually offset from the center line of the slit holder Record the screen position slit position and the difference between these the slit to screen distance in Table 2 1 Turn off the room lights and mark the positions of the maxima...

Страница 15: ...s by two to get the distances from the center of the pattern to the first and second order maxima Record these values of y in Table 2 1 Using the average wavelength of the laser 670 nm for the Diode Laser calculate the slit 1separation twice once using first order and once using second order Record the results in Table 2 1 Calculate the percent differences between the experimental slit separation ...

Страница 16: ...the first minima in the diffraction envelope increase decrease or stay the same when the slit separation is increased Does the distance to the first minima in the diffraction envelope increase decrease or stay the same when the slit width is increased ...

Страница 17: ... minimum 2 for the second minimum counting from the center out See Figure 3 1 When light passes through two slits the two light rays emerging from the slits interfere with each other and produce interference fringes The angle to the maxima bright fringes in the interference pat tern is given by d sin θ mλ m 0 1 2 3 where d is the slit separation θ is the angle from the center of the pattern to the...

Страница 18: ... double slits should be vertical and side by side on the screen Procedure Sketch the two side by side patterns roughly to scale Rotate the slit disk to the next comparison set 2 double slits with the same slit width but different slit separations Sketch the two side by side patterns roughly to scale Rotate the slit disk to the next comparison set 2 double slits with the same slit separation but di...

Страница 19: ...tern roughly to scale Select the hole pattern on the Single Slit Disk Sketch the resulting diffraction pattern roughly to scale Questions What are the similarities and differences between the single slit and the double slit How does the double slit pattern change when the slit separation is increased How does the double slit pattern change when the slit width is increased What differences are ther...

Страница 20: ...12 05880B 16 How does the diffraction pattern from a slit differ from the diffraction pattern from a line How does the diffraction pattern from the dot pattern differ from the diffraction pattern from the hole pattern ...

Страница 21: ...acting Technical Support Before you call the PASCO Technical Support staff it would be helpful to prepare the following information If your problem is with the PASCO apparatus note Title and model number usually listed on the label Approximate age of apparatus A detailed description of the problem sequence of events in case you can t call PASCO right away you won t lose valuable data If possible h...

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