Term
| What are 6 forms of natural light? |
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Definition
| sun, stars, moon, fire and lava, lighting, fire, bioluminescent(jellyfish, glow worms) |
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Term
| What are 5 forms of artificial lights? |
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Definition
| Chemoluminescent, Bioluminescent, Phoshorescent, Florescent, LED, Incandescent |
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Term
| How is the cost of lighting calculated? |
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Definition
K- Kilowatt hour T- time on for C - cost per KW/H
(W/1000)= (K) (K)(T)(C)=cost
Watts per hour divided by 1000 = Kilowatt per hour
KW/H multiplied by hours it is run for
*answer multiplied by cost per KW/H |
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Term
Label this diagram
[image] |
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Definition
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Term
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Definition
| a form of energy we can see |
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Term
| What are the basic principles of light? |
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Definition
| can be transformed into thermal, chemical, and electrical energy. Spreads out in all directions. |
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Term
Label this diagram
[image] |
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Definition
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Term
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Definition
| Light that travels at the same wavelength |
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Term
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Definition
| strands of glass underneath the ground that carries light for telephones and computers |
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Term
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Definition
| Refraction is the bending of light when it travels from one medium to another. |
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Term
Label this diagram
[image] |
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Definition
Refraction Diagram
[image] |
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Term
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Definition
| thinner on the edges and thicker in the middle. |
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Term
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Definition
| thicker in the middle thicker on the outside. |
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Term
| What happens when a person is nearsighted and how can they correct it? |
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Definition
| You can see close things but not things that are far away. The image forms before the retina. You can you a concave lens to correct this. |
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Term
| What happens when a person is farsighted and how can they correct it? |
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Definition
| You can see far things but not things that are close. The image forms after the retina. You can you a convex lens to correct this. |
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Term
Label this diagram
[image] |
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Definition
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Term
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Definition
| The cornea is the protective layer on the outside. |
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Term
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Definition
| This is the fluid between the cornea and the iris. It helps refract the light that enters the eye. |
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Term
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Definition
| The iris, is the coloured ring. If the light is dim, the iris increases the size of the eye’s opening to let in more light. |
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Term
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Definition
| The pupil is the opening that lets in light to the eye. It appears black. |
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Term
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Definition
| The lens magnifies and focuses the image - accommodation |
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Term
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Definition
| This muscle changes the shape of the lens to focus on an object moving closer or further away from the eye. |
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Term
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Definition
| This is the fluid behind the lens in the middle of the eye. It helps shape the eye. |
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Term
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Definition
| This part of the eye senses light. |
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Term
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Definition
| This nerve sends the detected light to the brain. The point where this enters the retina is called a blind spot. |
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Term
| What is the difference between a refracting and reflecting telescope? |
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Definition
Refracting telescope - collects light from a distant object and is then focussed by a convex lens.
Reflecting telescope - a concave mirror to collect light from an object. It forms a real image, which then is magnified by the objective lens. |
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Term
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Definition
| An object is heated up enough to create visible lights. |
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Term
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Definition
| An electrode causes the mercury vapours to give off ultraviolet light (radiation). A phosphor coating absorbs this radiation and cause the bulb to glow. |
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Term
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Definition
| A chemical reaction that produced energetic particles that give of visible light. |
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Term
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Definition
| Light energy is absorbed by particles that store this energy for a while and is later released. |
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Term
| How does the eye form images? |
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Definition
| The lens in the human eye is a convex lens. This lens takes light rays from objects and, by refraction, focusses them, or brings them back to a point. The image you see is formed on the retina |
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Term
| How are prisms used in binoculars? |
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Definition
| They reflect the light back and forth until they hit your eye? |
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