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In this section, we study the complications to the double-slit experiment that arise when you also need to take into account the diffraction effect of each slit. To calculate the diffraction pattern for two (or any number of) slits, we need to generalize the method we just used for a single slit.
Summary. Young’s double slit experiment gave definitive proof of the wave character of light. An interference pattern is obtained by the superposition of light from two slits. There is constructive interference when d sinθ = mλ(form = 0, 1, −2, 2, −2,...) d sin. .
In this section, we study the complications to the double-slit experiment that arise when you also need to take into account the diffraction effect of each slit. To calculate the diffraction pattern for two (or any number of) slits, we need to generalize the method we just used for a single slit.
Example 14.1: Double-Slit Experiment Suppose in the double-slit arrangement, d =0.150mm, L =120cm, λ=833nm, and y =2.00cm . (a) What is the path difference δ for the rays from the two slits arriving at point P? (b) Express this path difference in terms of λ. (c) Does point P correspond to a maximum, a minimum, or an intermediate condition?
In the double-slit experiments, both effects will be at work: diffraction of light through each slit and interference from the two separate slits. The observed double-slit pattern will have minima corresponding to both formulas, and the pattern itself will look like this: The Fraunhofer pattern formed by diffraction at each slit acts as an ...
Young’s double slit experiment breaks a single light beam into two sources. Would the same pattern be obtained for two independent sources of light, such as the headlights of a distant car? Explain. Suppose you use the same double slit to perform Young’s double slit experiment in air and then repeat the experiment in water.
In modern physics, the double-slit experiment demonstrates that light and matter can exhibit behavior of both classical particles and classical waves. This ambiguity is considered evidence for the fundamentally probabilistic nature of quantum mechanics.
