ray
1
6.4
- noun
- /reɪ/
- Specialized
- OK, so here we have two rays, ray AB and ray AC, right?
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Watch on YouTubeCan you measure how long something is and what the angle is between two different rays or vectors?
- Can you measure how long something is and what the angle is between two different rays or vectors?
- The idea that if you saw it with a little line segment, take two perpendicular rays and let them move off to Infinity.
Examples
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Well, an angle is a figure formed by two rays that have a common end point.
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So the ray AC is just a different way to write the ray AB.
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Let's suppose a light ray passes through those two points.
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And these two rays meet at this point.
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Here you should be able to sort of draw the ray diagrams and just drawing a few of them.
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Can you measure how long something is and what the angle is between two different rays or vectors?
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That refracts the ray, splits the colours, defuses them at an oblique angle and bends it out into a dispersed colour band.
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In geometry, a ray is defined as a straight line that begins at a point and extends endlessly in one direction.
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When studying angles, two rays that originate from the same endpoint are used to form the angle.
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You can draw a ray on the graph starting from the origin and extending to the right infinitely.
Compounds
- Specialized
22
4.2
Very strong invisible rays that come from radioactive materials and can harm living tissue
- Specialized
15
3.3
A machine that uses X rays to take pictures of the inside of the body or of bags
- Specialized
6
3.9
A strong invisible light from the sun that can damage skin and kill germs
4
4.8
A very large sea animal with wide triangle-shaped fins that eats tiny sea plants and animals
- Specialized
3
7.0
A stream of electrons in a vacuum tube that makes images on old television screens or similar devices
- Specialized
2
6.9
A strong invisible light from a special lamp used for tanning or skin treatment
- Archaic
2
6.0
A large glass device in old TVs and computer screens that makes pictures with a beam of electrons
- Specialized
1
3.0
Special film that records pictures made by X-rays to show bones or the inside of objects
- Specialized
1
7.1
A way X-rays scatter from the atoms in a crystal to show its structure
1
7.5
A large flat sea animal in warm water with long pointed fins and white spots on its back
1
7.2
A flat sea fish with a rounded body that lives on the sea floor and gives strong electric shocks
- Archaic
1
6.9
People use a very short wave of energy to take pictures of the inside of the body
- Specialized
1
9.9
A band of cells in a stem or root that moves water and nutrients sideways
- Specialized
1
9.2
A large flat sea animal with wing-like fins and a pointed nose found along the east coast of North America
- Archaic
1
8.2
An electronic device that shows changing electrical signals as lines on a screen using a tube
- Specialized
A lamp that gives strong ultraviolet light for medical or beauty treatments
- Specialized
A thin layer of cells in a plant stem that moves water and food sideways
Surface Forms
Etymology
Ray in geometry comes from Latin radius 'spoke', so a mathematical ray is a straight line that starts at a point and goes out in one direction like a spoke from the center.