PHYS 101 Pre-Lab #6

# PHYS 101 Pre-Lab #6 - average To begin the experiment set...

This preview shows page 1. Sign up to view the full content.

10/24/07 PHYS 101-20 Lab #6 – Diffraction and the Wave Nature of Light Objective : To understand the wave properties of light by studying the diffraction patterns of laser light generated by different slit patterns in a diffraction card. The idea that light is made of photons contradicted ideas that physicists already maintained about the wave properties of light, such as interference and diffraction. A solution called wave-particle duality explains how light can have the properties of both waves and particles. It states that light may be both, and it can be measured by either property whenever physicists need to do so. This theory has held for the past century, but scientists are still not exactly certain of what light is, though the wave particle duality theory has helped to understand all different forms of matter and energy in the universe. Equation : 1) λ exp = (d/L) x (y/n)
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: average To begin the experiment, set up the laser system aligning the diffraction card so that the laser shines through slit A. Sketch the resulting diffraction pattern, then measure and record the distance from the diffraction card to the wall (L). The width of slit A of the diffraction card is 4 x 10-5 meters (d). Next, begin measuring the distances from the central maximum to each of the dark spots (y). Then, calculate the experimental value for the wavelength of the laser using the equation given above. Compare the experimental value with the actual value for the wavelength (λ = 633 x 10-9 m) by finding the percent error between the two. Using the calculated wavelength value, repeat the procedure to measure the slit width of slit B or slit C on the diffraction card. Compare the calculated value to the actual value of the corresponding slit....
View Full Document

## This note was uploaded on 04/30/2008 for the course PHYS 101 taught by Professor 1 during the Spring '08 term at Tulane.

Ask a homework question - tutors are online