The phenomenon which occurs when the light rays travel from a more optically denser medium to a less optically denser medium.

When the incident ray falls on every face of the diamond such that the angle formed, the ray is greater than the critical angle. The critical value of the diamond is 23°. This condition is responsible for the total internal reflection in a diamond which makes it shine.

Concave lenses have total internal reflectionbrainly

Each build occurs within a build path which is typically either a build subdirectory, or a variant-specific subdirectory under build. For example, a package with two python-based variants might look like this:

When a rez environment is configured, each required package’s commands() section configures the environment for the building package to use. When a build is occurring, a special variable building is set to True. Your required packages should use this variable to communicate build information to the package being built.

Build utilities. For example, you may have a package called pyqt_cmake_utils, which provides CMake macros for converting ui files to py;

As well as detecting the build system from build files, a package can explicitly specify its own build command, using the build_command package attribute. If present, this takes precedence over other detected build systems.

An example use case of build_requires is a header-only (hpp) C++ library. If your own C++ package includes this library in its own headers, other packages will also need this library at build time (since they may include your headers, which in turn include the hpp headers).

We know that light is the form of energy that can undergo various phenomena like reflection, refraction, dispersion, and total internal reflection. It is the phenomenon responsible for optical illusions like a mirage and also the reason for diamonds to shine. In this session, let us know more about the total internal reflection.

Sometimes it is desirable for a package to depend on another package only for the purposes of building its code, or perhaps generating documentation. Let’s use documentation as an example: a C++ project may need to builds its docs using doxygen, but once the docs are generated, doxygen is no longer needed.

The formula to find the critical angle is: \(\begin{array}{l}sin \theta =\frac{n_{2}}{n_{1}}\end{array} \) Where, n1 is the refractive index in medium 1 n2 is the refractive index in medium 2 Ө is the critical angle

A local install builds and installs the package to the local package repository, which is typically the directory ~/packages. This directory is listed at the start of the package search path, so when you resolve an environment to test with, the locally installed package will be picked up first. Your package will typically be installed to ~/packages/name/version, for example ~/packages/maya_utils/1.0.5. If you have variants, they will be installed into subdirectories within this install path (see Disk Structure for more details).

When the incident ray falls on the cladding, it suffers total internal reflection as the angle formed by the ray is greater than the critical angle. Optical fibres have revolutionised the speed with which signals are transferred, not only across cities but across countries and continents making telecommunication one of the fastest modes of information transfer. Optical fibres are also used in endoscopy.

This is achieved by listing build-time dependencies under a build_requires or private_build_requires section in the package.py. The requirements in private_build_requires are only used from the package being built. Requirements from build_requires however are transitive, build requirements from all packages in the build environment are included.

After you’ve made some code changes, you presumably want to test them. You do this by locally installing the package, then resolving an environment with rez-env to test the package in. The cycle goes like this:

Rez supports multiple build systems, and new ones can be added as plugins. When a build is invoked, the build system is detected automatically. For example, if a CMakeLists.txt file is found in the package’s root directory, the cmake build system is used.

The added arguments are stored into environment variables so that your build script can access them. They are prefixed with __PARSE_ARG_; in our example above, the variable __PARSE_ARG_FOO will be set. Booleans will be set to 0/1, and lists are space separated, with quotes where necessary.

Consider the following situation. A ray of light passes from a medium of water to that of air. Light ray will be refracted at the junction separating the two media. Since it passes from a medium of a higher refractive index to that having a lower refractive index, the refracted light ray bends away from the normal. At a specific angle of incidence, the incident ray of light is refracted in such a way that it passes along the surface of the water. This particular angle of incidence is called the critical angle. Here the angle of refraction is 90 degrees. When the angle of incidence is greater than the critical angle, the incident ray is reflected back to the medium. We call this phenomenon total internal reflection.

Q1. An optical fibre made up the glass with refractive index n1 = 1.5 which is surrounded by another glass of refractive index n2. Find the refractive index n2 of the cladding such that the critical angle between the two cladding is 80°.

Concave lenses have total internal reflectionquizlet

As it happens, the find_package CMake macro searches the paths listed in the CMAKE_MODULE_PATH environment variable, and looks for a file called FindXXX.cmake, where XXX is the name of the package (in this case, Boost), which it then includes.

First, some build system plugins add extra options to the rez-build command directly. For example, if you are in a CMake-based package, and you run rez-build -h, you will see cmake-specific options listed, such as --build-target.

It is an optical illusion that is responsible for the appearance of the water layer at short distances in a desert or on the road. Mirage is an example of total internal reflection which occurs due to atmospheric refraction.

The current working directory during a build is set to the build path, not to the package root directory. For this reason, you will typically use the {root} string to refer to a build script in the package’s root directory.

When rez-build is run on this package, the given build.sh script will be executed with bash. The {root} string expands to the root path of the package (the same directory containing package.py. The {install} string expands to install if an install is occurring, or the empty string otherwise. This is useful for passing the install target directly to the command (for example, when using make) rather than relying on a build script checking the REZ_BUILD_INSTALL environment variable.

Total internal reflection is given by the formula: \(\begin{array}{l}\frac{n_{1}}{n_{2}}=\frac{sin r}{sin i}\end{array} \) Where, r is the angle of refraction i is the angle of incidence n1 is the refractive index in medium 1 n2 is the refractive index in medium 2

The short answer is, that is entirely up to you. Rez is not actually a build system. It supports various build systems (as the next section describes), and it configures the build environment, but the details of the build itself are left open for the user. Having said that, CMake has been supported by rez for some time, and rez comes with a decent amount of utility code to manage CMake builds.

You don’t need to run rez-env after every install. If your package’s requirements haven’t changed, you can keep using the existing test environment.

Second, you can pass arguments directly to the build system, either using the rez-build --build-args option or listing the build system arguments after --.

Note that commands() is never executed for the package actually being built. If you want to run commands in that case, you can use pre_build_commands() instead.

Then, the package’s build_requires is appended. This is transitive, meaning that the build_requires of all other packages in the environment are also used;

You can add arguments for your build script to the rez-build command directly, by providing a parse_build_args.py source file in the package root directory. Here is an example:

Let’s say I have two C++ packages, maya_utils and the well-known boost library. How does maya_utils find boost’s header files, or library files?