College / Physics

Interference and Diffraction

Diffraction and interference patterns are measured for single and double slits by scanning the laser pattern with a light sensor and plotting light intensity versus distance. Differences and similarities between interference and diffraction patterns are examined, including the effect of changing the wavelength of the light.


Student Files

71_Interference___Diffraction.cap 1.39 MB
71_Interference___Diffraction_w_Data.cap 1.92 MB
71_Interference_and_Diffraction.docx 1.75 MB
71_2_slit_pattern.jpg 104.48 KB
71_Diffraction_Sensor_Set_up.jpg 517.95 KB
71_Diffraction_Laser_Adjust.jpg 562.07 KB
71_double_slit_theory.jpg 40.04 KB
71_Double_Slit_Theory2.jpg 154.34 KB
71_EX-5545.jpg 393.35 KB
71_EX-5545_inset_w-hand.jpg 268.14 KB
71_light_with_laser_contrast.JPG 75.53 KB
71_Single_Slit_theory2.jpg 35.74 KB
71_Single_Slit_theory3.jpg 40.29 KB
71_Table.JPG 135.37 KB
71_Interference_and_Diffraction.pdf 486.34 KB

Featured Equipment

High Sensitivity Light Sensor

PASPORT High Sensitivity Light Sensor

Designed to perform visible light studies from low intensity spectral studies to daylight. Built in oversampling reduces noise. PASPORT version.

High-Precision Diffraction Slits

Precision Diffraction Slits

Includes two slit wheels allowing students to examine various diffraction patterns.

Sensor-Based Diffraction System

Sensor-Based Diffraction System

Enables students to scan many diffraction and interference patterns during one lab period.

Many lab activities can be conducted with our Wireless, PASPORT, or even ScienceWorkshop sensors and equipment. For assistance with substituting compatible instruments, contact PASCO Technical Support. We're here to help.

Copyright Disclaimer: Section 107 of the Copyright Act of 1976 makes allowance for “fair use” for purposes of teaching, scholarship, education and research. Reproduction under any other circumstances, without the written consent of PASCO, is prohibited.
Source: Lab #71

Comprehensive 850 Physics System

Interference and Diffraction