> For the complete documentation index, see [llms.txt](https://www.xrdev.app/mixed-reality-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.xrdev.app/mixed-reality-docs/lessons/lesson1/concepts.md). # Concepts In this lesson, you will learn about the **basic concepts** of **Mixed Reality** and explore the **applications of Mixed Reality** in different **industries**. Read through the questions below. If you feel comfortable with the answer, feel free to skip to [project](/mixed-reality-docs/lessons/lesson1/project.md) section or next chapters. * [What is Mixed Reality? ](/mixed-reality-docs/lessons/lesson1/concepts/what-is-mixed-reality.md) * [What is the difference between Augmented Reality, Virtual Reality and Mixed Reality?](/mixed-reality-docs/lessons/lesson1/concepts/what-is-the-difference-between-augmented-reality-virtual-reality-and-mixed-reality.md) * [Why is Mixed Reality important?](/mixed-reality-docs/lessons/lesson1/concepts/why-is-mixed-reality-important.md) * [Will mixed reality replace our phones and PCs?](/mixed-reality-docs/lessons/lesson1/concepts/will-mixed-reality-replace-our-phones-and-personal-computers.md) * [How do I decide if I need to develop for Virtual Reality or Augmented Reality?](/mixed-reality-docs/lessons/lesson1/concepts/how-do-i-decide-if-i-need-to-develop-for-virtual-reality-or-augmented-reality.md) * [What are some use cases for Mixed Reality applications?](/mixed-reality-docs/lessons/lesson1/concepts/what-are-some-use-cases-for-mixed-reality-applications.md) * [What are some examples of Mixed Reality Applications?](/mixed-reality-docs/lessons/lesson1/concepts/what-are-some-examples-of-mixed-reality-applications.md) * [What is Mixed Reality Toolkit(MRTK)?](/mixed-reality-docs/lessons/lesson1/concepts/what-is-mixed-reality-toolkit-mrtk.md) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://www.xrdev.app/mixed-reality-docs/lessons/lesson1/concepts.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.