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Little Lady Diaper Stacker
This Little Lady will delight your little one with her pearls, handbag and... More |
...thumb|300px|A beam of white light is dispersed into its constituent colors by its passage through a prism |prism. The fainter beam of white light exiting to the upper right has been reflected (without dispersion) off the first surface of the prism.] Read full entry
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- 1.Light - Wikipedia, the free encyclopedia
- For other uses, see Light (disambiguation) ... Light is electromagnetic radiation, particularly radiation of a wavelength that ...
- http://en.wikipedia.org/wiki/L
ight
- 2.light: Definition, Synonyms from Answers.com
- light n. Physics. Electromagnetic radiation that has a wavelength in the range from about 4,000 (violet) to about 7,700 (red) angstroms and may be
- http://www.answers.com/topic/l
ight
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light?????????
when light enters a prism,
does the sphape of the prism
effect the direction light
changes????
for example: light enters a
glass that has a rectangular
prism shape or light enters a
glass that has a cone shape.
i also have that same thought
because i was about thinking
about the shape of a diamond.
Too deep or too shallow will
cause light to be not
refracted as much.
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Yes, there are basically two factors that affect the way light is bent through a prism. These are: 1. The refractive index of air (assuming your prism is sitting in air), and the refractive index of the prism material (glass, plastic, etc.) 2. The angle at which the light enters the prism (the angle of incidence). The equation governing this is called Snell's Law, and it uses trigonometry (some of the other buttons on the calculator) to allow either an angle or an index of refraction to be calculated, if the other 3 pieces of information are known. If the light is incident on a flat surface, like a prism, it will bend uniformly. If the light is incident on a curved surface, like a cylinder, the bend angles will differ across the light beam, depending on the angles that the individual light photons strike the glass. Basically, this is how a lens works. The glass surface is curved just right to get most of the light rays to come together (focus) at some point on the other side. |
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How do Light dependent I understand that as the light
intensity increases the
resistance decreases and vice
versa in an LDR. But I don't
know why, shouldn't it be the
other way around because in
the morning when there is high
light intensity shouldn't it
there be high resistance to
prevent any current to light
up the bulb. And at night when
there is low light intensity
the resistance decreases to
allow more current to light up
the bulb. Thanks!
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By allowing the resistance of the LDR to decrease, this allows the extra current to operate a relay which will cut off the supply to the bulb. Once the resistance increases on the approach of darkness there is insufficient current for the relay to operate and the connection to the bulb will be re-instated. Nowadays, instead of using mechanical relays a solid state (transistors, etc) circuit is used. |
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What type of lighting should I I am getting ready to finish
my basement and will be
designing an area with
backdrops, etc. so that I can
take pictures of my son. I
have a decent camera for a
point and shoot (Canon
A630)...and am hoping to start
taking some portrait shots of
my 1 year old. Since the
basement has little to no
natural light, I am wondering
what type of lighting I should
install in order to get
quality photos. Do I need to
invest in lighting
specifically geared towards
photography or can I re-create
that type of lighting by
finishing out the area with a
certain type of light? I don't
know much about the different
types of photography lighting
available, but I can use some
of the advanced options on my
camera. I am definitely still
an amatuer in photography, but
I am hoping to improve. Any
advice or tips would be
greatly appreciated!
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You didn't say whether your camera was digital or uses film. If it uses film, the "color" of the artificial light and the amount of it will be more important than if it's a digital camera. For indoor "portrait" photography, generally the lights are set up in a particular way, generally one on each side of the front of the subject and angling down, and possibly one shining on the hair from above. You can make the shadows and even tones be any way that looks good to you, but it's best to read about what creates what effect before you try to photograph a child. In fact, if your one year old is walking, you probably will do better to take the photos outdoors, or at least have the area well and evenly lit so that you can follow him/her all around! You might want to check out some of the info on the page on photography at my site: http://glassattic.com/polymer/ photography.htm ... it has lots of tips about doing all kinds of photography with artificial or natural light, as well as various good links on general photography, you can check out. I'd recommend buying a book on "photographing people" too because so much of the info will be condensed there, along with visual examples... Kodak or some other company used to put out some good ones on various topics, including that one. In fact, it's probably at the library too, along with others. Good luck! Diane B. |
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