Interference and diffraction throughout physics

Luis A. Muñoz Torres

The sources are those that emit coherent light waves of the same wavelength or frequency which are always in phase with each other or have a constant phase difference. The two coherent sources can produce the phenomenon of interference. The colors that we see when sunlight falls on a soap bubble, a little oil or wet pavement, or a red hummingbird are caused by interference of light waves reflected from the front to the back of the surfaces of thin transparent films. This is because two beams of waves arriving at the same level if they add their effects in phase or counteract its effects if they date. Their combined effect is obtained by adding algebraically the displacements at the point to the sources individually. This is known as the principle of superposition.

Young's experiment seeking behavior or the nature of light. With a dual-slot grille experimentation was carried out very similar to this interference experiment which sought to show whether light consists of particles or waves passing through the dual grid. Was observed pattern formed on the white screen. If light consisted of particles have been observed two white stripes on the screen however, there was a distinct pattern on the screen which had a larger line in the center and smaller stripes on each side. This is due to the phenomenon of wave diffraction and interference the light passing through the diffraction gratings and then suffer the light of the grids interferes with light passing through the other grid and that is why it forms a most intense line in the center of the screen. There is constructive interference and destructive interference that is why we see dark spaces between each line and in the center look brighter light because there we have constructive interference.

Data obtained in the experiment shows the distance between the center of the peak and each peak. The light intensity as a function of linear position. The peaks represent locations where the bands are intense in the white screen (constructive interference) and represent the minimum destructive interference. As the number n peak distance increases and the peaks are decreasing intensity. The formula that relates the distance (Dx), the wavelength (λ), the separation between the slits (d) and the distance between the device and the sensor grid of light (L) is: dΔx / L = nλ.

We show the behavior of interference of light waves. It can be seen clearly as peaks and troughs are not defined very well. This is why the measure was taken away from the low near each side of the central peak. Constructive and destructive interference cannot be seen as clearly as when using the dual grid.

By observing the behavior of light diffracted as it passes through the interference grids shows that the laser passes through the grid divided into upper and lower those in the light sensor as points. This is because the light as it passes through the grating is diffracted simple. In the experiment of additional double grating diffraction, we observe the interference effect in which the peaks of the wave are altered as two waves intersect and cause interference.