The ray passes symmetrically through the prism when d = D. This condition for minimum deviation therefore corresponds to the condition in which i = e and so also r 1 = r 2.
#Protractor install#
To install the codemod, run: npm install jscodeshift wdio/codemod. For this tutorial we use a Protractor boilerplate project and fully migrate it to WebdriverIO. The value of i at which i and e are equal (found by drawing the line corresponding to i = e on the same axes and noting its point of intersection with the graph) is found to have the value i′ corresponding to minimum deviation D. The Protractor and WebdriverIO API is actually very similar, to a point where the majority of commands can be rewritten in an automted way through a codemod. If a second graph is plotted of i against e, the angle of emergence measured between P 3 P 4 and the normal at M, this appears as shown in Fig. The value of d is found to pass through a minimum value D at some value i′ of i. If a graph is plotted of d against i, this appears as in Fig. If you have any questions, please contact sales at 42 or by email at. The angle of deviation d between P 1 P 2 and P 3 P 4 may be measured using a protractor and this whole procedure repeated for various angles of incidence i, the angle between P 1 P 2 and the normal constructed at N. If you get a number not listed on the available protractor list, round up to the nearest 1/8'.
The refracted ray may be drawn in, this being represented by NM, where N and M are the points of intersection with the prism faces of the lines drawn through P 1 P 2 and P 3 P 4, these representing incident and emergent rays respectively. Pins P 3 and P 4 are placed so as to appear in line with the images of pins P 1 and P 2 seen through the prism. Configuration File Protractor API Style Guide Protractor Syntax vs WebDriverJS Syntax Browser Support Plugins Timeouts The. The path of a ray of light through a glass prism may be traced using pins as illustrated in Fig. Getting Started Tutorial Working with Spec and Config Files Setting Up the System Under Test Using Locators Using Page Objects to Organize Tests Debugging Protractor Tests Reference.
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