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Comparator in research

In the List Sorting Chapter, you learned how to sort lists alphabetically and numerically, but what if the list has objects in it?

Comparators can also be used to make special sorting rules for strings and numbers. In this example we use a comparator to list all of the even numbers before the odd ones:

Comparator in digital Electronics

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Circularly polarized light is composed of 50% linearly horizontally polarized light and 50% linearly vertically polarized light. The two linearly polarized components are 90 degrees out of phase. If perfectly circularly polarized light passes through a perfect linear polarizer that transmits horizontal (vertical) polarized light then the output will be perfectly linearly horizontal (vertical) polarized light with 50% of the power of the incident circular polarized light. The answer is the same whether the incident light is right- or left-hand circularly polarized.

Comparator C++

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The reason I’m asking is because I’ve heard that in photography linear polarizers can cut through smog but not through fog, which generates circularly polarized light. This seems strange, because one would assume that the linear polarizer would absorb all of the circularly polarized light and would thus cut through the fog. Why is this not so?

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I have seen a lot of examples of what happens when circularly polarized light passes through a circular polarizer composed of a quarter-wave plate and a linear polarizer, but what would happen to the circularly polarized light if it passed through only the linear polarizer without a quarter-wave plate?

To sort objects you need to specify a rule that decides how objects should be sorted. For example, if you have a list of cars you might want to sort them by year, the rule could be that cars with an earlier year go first.

Comparator Minecraft

As a result, only one of the waves makes it through the polariser and the transmitted light will be linearly polarised and of half the intensity of the original beam. This will be true, irrespective of how you rotate the polariser.

The Comparator interface allows you to create a class with a compare() method that compares two objects to decide which one should go first in a list.

Comparator circuit

Comparator Java

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To make the code shorter, the comparator can be replaced with a lambda expression which has the same arguments and return value as the compare() method:

The compareTo() method takes an object as an argument and compares the comparable with the argument to decide which one should go first in a list.

Circularly polarised light can be decomposed into two electromagnetic waves, with their respective electric fields linearly polarised at right angles to each other, of equal amplitude but 90 degrees out of phase. One of the polarisations can be chosen to line up with the polariser and the other at right angles to it. e.g. $${\bf E} = E_0 \sin(\omega t - kz)\ {\bf i} + E_o \sin(\omega t -kz -\pi/2)\ {\bf j}\ .$$ Note that you can choose any pair of orthogonal unit vectors that are in a plane at right angles to the wave motion. So you can choose to have one of those unit vectors be along the axis of the linear polariser.

It is easier to use the Comparable interface when possible, but the Comparator interface is more powerful because it allows you to sort any kind of object even if you cannot change its code. ❮ Previous Next ❯ ★ +1   W3schools Pathfinder Track your progress - it's free!   Log in Sign Up