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Physics Classroom is making strides to make our site accessible to everyone. Our site contains 6 navigation areas. The Primary, Secondary, and Page Level navigations have a screen reader version of their nav structure that allows using the left and right keys to navigate sibling navigation items, and up or down keys to navigate parent or child navigation items. The others can be navigated using tabs. The Primary Navigation handles the first 2 levels of site pages. The Secondary (which is not always available) handles the 3rd and 4th level of structure. The Page level navigation allows you to navigate the current page's headings quickly. The Header Navigation contains the Light/Dark Mode toggle, Search, Notifications and account login. The Breadcrumb Navigation contains the breadcrumb of the current page. If the current page has a breadcrumb, you can get to it by skipping to the content and tabbing in reverse (shift plus tab). The Footer Navigation contains links such as Privacy, Contact, about and terms. Some resources contain an Audio Player that can be activated by holding down the T key for 3 seconds, and then using K to pause and resume. While not every area of Physics Classroom is usable purely from keyboard and screen reader, we are committed to continue work on making this possible. If you have questions or need additional help, please use this link to contact us.

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Waves - Case Studies - Directions

Using the Case Studies: Waves Concept Builder is quite simple. You will be presented with a wave pattern displaying a particular wavelength and amplitude. There is a grid in the background to assist in obtaining a quantitative measure of both wavelength and amplitude. You will then be asked to identify the wave pattern that results for a particular change. For instance, you might be asked to determine the wave pattern for the case of two times the wavelength and one-half the amplitude. There will be three choices, with each choice being a diagram of a wave pattern. You can select an answer by tapping on one of the diagrams. The diagram will be highlighted by a grey box and the Check Answer button will appear. If you are not satisfied with your answer, then you can tap on another choice. Tapping on a selected choice removes the selected answer and hides the Check Answer button. When you are satisfied with your answer, tap on the Check Answer button. Your answer will be evaluated and feedback will be given. The Progress Report will be updated and you will be given a new question.

Your goal is to earn "Stars" and to complete one or more activities. Stars are earned when you show success on a particular question. Once you show success on all the questions for a particular activitiy, you will earn the Trophy for that activitiy.

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