Optical

Question: What is the optical spot for on the xbox 360 hdmi converter? I know it is for an optical cord but if i purchase the optical cord where does it connect to? It has a spot for hdmi and optical i plugged my hdmi cord from converter to my hd tv. everything works but where does the optical cord go to from hdmi converter?

Answer: It may be for audio, and if your TV does not have an "optical in" for the input you have chosen, maybe you can feed it to a receiver for kick @$$ audio. The small square with a notch input/ output optical is usually reserved for audio.

Question: Is 10x optical zoom good enough to take pictures at a football game or should i go stronger? I am going to an nfl game and sitting at the lower level. I want to take great pictures and wondering if i should go with a 10x optical zoom or kick out a little extra for a 12x optical zoom. Is there even a significant difference in zoom power. i am either going to get Panasonic DMC-FZ8S Lumix 7 or Panasonic DMC-TZ3K 7.2. I am leaning towards the smaller one because it seems easier to carry but the larger one has more optical zoom. Also i am worried about scratching the lens on the bigger one because it doesn't automatically shut the lens when it's off in comparrison to the smaller one. I have no idea what to do. please help. Any suggestions on this topic would be appreciated.

Answer: I would guess if you're sitting at the lower level then you'll be fine with a 10x zoom. I don't think a 12x zoom would hurt either - but since you mention the size would be larger you need to make sure that a professional looking (or a semipro to say the least) are allowed in such venue. However since there's less light entering your camera on a high zoom level, you're gonna have to compensate with slower shutter speed and therefore it is advisable to bring a tripod along. Good luck!

Question: What is the relationship between optical lenses and the digital optical ranges? I have a HP Photosmart 945 with an 8x optical and 7x digital zoom. I am considering a Canon Rebel for a replacement and want to know what lens I would need to meet or exceed the range of the my current camera.

Answer: Firstly, you can disregard any importance in using digital zoom. The HP 945 has an optical focal length equivalent of 37mm-300mm. So, you will need a lens with a focal length in that range or more. You might have to buy at least two lenses to achieve that, though. I have provided you with some links that may be helpful...

Question: How does the optical density of a solution containing BAPNA relate to enzyme activity? How does the optical density of a solution containing BAPNA relate to enzyme activity?

Answer: BAPNA is used in experiments in place of proteins. The enzymes pepsin and trypsin both help digest proteins. When either is added to a solution of BAPNA, the solution turns clear yellow.

Question: What's the difference between the optical and digial zoom on a digital camera? I'm looking into buying my first digital camera and i've been reading about the different models. This one model says "3x optical/4x digital/12x total zoom"...what's the difference between optical and digital zoom and what's meant by "total zoom?" Huh? Speak in simple terms please.

Answer: Optical zoom is true zoom. One or more elements (or simply put: pieces of glass) inside the lens moves to manipulate light. This type of zoom is made possible only by the physical properties of the lens. Digital zoom is "fake" zoom. The camera basically cuts the center of the picture after it's been taken and blows it back up to the maximum resolution that the camera can output. It's simply marketing tool used to push cameras; digital zoom should be completely disregarded when considering cameras and camcorders. Total zoom is the combined theoretical zoom that can be achieved (3x optical * 4x digital = 12x total).

Question: What is the difference between a optical mouse and wireless mouse? What is the difference between a optical mouse and wireless mouse? I kind of got confused when some mouse's were named optical and wireless and the ones with the cords, which the green thing in the back. I got a mouse and keyboard with the little cord attached to the mouse and to the back of the computer and were wondering what are those called.

Answer: Those are different technologies. A wired (old school) mouse it physically connected to the computer. A wireless mouse talks to a receiver that catches a radio wave from the mouse that tells the computer how it has moved, buttons pressed whatever. A mechanical mouse it the old school kind that had a ball on it that turned axes and the computer determined where it was going based on how much the vertical roller moved and how much the horizontal roller moved. These touched the surface and collected dirt. An optical mouse has a small scanner or camera that see's how it's moving. If you were in a car with a glass floor and never looked up, you'd still know which way you were going; same concept. You can have a wired optical mouse, or a wireless one; a wired mechanical mouse, or a wireless one (rare nowadays.) The cables you refer to in the second part of your question are color coded nowadays. Green is for your mouse and purple (rarely orange) round cables are called ps/2. The rectangular type is called USB. Unless you're using a USB connector, you just need to match the color when connecting almost anything on your computer

Question: How is the optical drive connected to the other components on the motherboard? How is the optical drive connected to the other components on the motherboard?

Answer: With a SATA or IDE cable, usually.

Question: What is the difference between digital and optical zoom? I'm stuck between two cameras camera A has 4X optical zoom and 2X digital zoom camera B has 3.8X optical and 4X digital zoom I really like A but does this difference matter much?

Answer: optical = good digital = bad With optical it actually moves lenses around to bend the light and enlarge the image on the sensor. With digital, all it does is crop the image and compute a new image. As long as the camera is held steady, optical zoom shouldn't affect picture quality. Digital zoom always screws up the picture quality.

Question: How to remove the optical whitener from a white fabric? Can any body tell me a procedure to completely remove the optical brightener from a white fabric?

Answer: Please refer the following website for tips.

Question: Digital versus optical zoom in camcorders: How do they work side by side? I understand that a high optical zoom (when used) delivers a clear picture while a high digital zoom (when used) delivers an unclear picture. What I want to know is, do these 2 different features work dependantly or independantly from each other? Are there camcorders that come with both high optical zooms and low digital zooms at the same time? Or does having a high optical zoom inevitably impose the camera with a high digital zoom? And, if this is the sad but true case, can the digital zoom be deactivated during shooting, leaving active only the optical zoom, so that zooming is done optically instead of digitally, for the sake of capturing a clear and well defined picture, instead of a fuzzy, pixelated image? By the same token, just for knowledge purposes, can the optical zoom be deactivated while leaving active only the digital zoom?

Answer: Typically, the optical zoom would be used 1st until it has reached the upper limit, then the digital zoom takes over at that point. Therefore, the digital zoom is more of a supplement to the optical zoom. Here's a good explanation of digital zoom: http://www.dpreview.com/learn/?/Glossary/Digital_Imaging/Digital_zoom_01.htm

Question: What to expect at walmart optical for my eye exam? What to expect at walmart optical for my eye exam? Im 20 years old and havent been to the Optometrists in about 6 years. What should i expect? Can i drive home if i get my eyes dilated? Im planning on getting colored contacts. Will they give me a pair to keep till my order of contacts come in? Theres so many colors ive been checking out and i dont know which color will suit me, do they let you try different colors on? And how much should i expect to pay for the whole thing?

Answer: I hadn't been in probably 8 years before my last visit, because my vision hasn't changed in forever. But I wanted some colored contacts to enhance my natural color, so I went for the eye exam and fitting. You will be able to drive home if he/she dilates your eyes; just be sure to get a pair of those blinder-looking shades they have at the office. Your eyes will be sensitive to light for a short while after dilation. The eye doctor didn't dilate my eyes...he just had me read off the chart to verify my vision power, then gave me a glaucoma test (you may not need this yet- I'm 27 and there is some history of glaucoma in my family), and measured my pupils for contacts. After that, he took me to a table and let me practice putting in and removing contacts, and trained me on how to clean and store them when I'm not wearing them. The eye doctor will let you try on as many colors as you like, and he/she will send you home with at least one trial pair to wear for 2 weeks, to see how you do wearing them. I tried on about every color of trial lenses they had haha, and the doctor didn't mind a bit. It's good to get an idea of what you do and don't like before you start ordering them by the box. My total at a Wal Mart Vision Center was $91, including the eye exam, fitting, trial pair of colored contacts, 2 sample sizes of solution, a contact lens case, and my prescription. You can order your contacts anywhere that you want to as soon as you have a prescription. The Wal Mart Vision Centers are pretty fairly priced, but I can still get my Freshlook contacts cheaper on 1800contacts.com, and they ship really fast.

Question: Are there any wireless headphones that connect to optical audio inputs? Im looking for a decent set of wireless headphones that connect to optical audio input. Unfortunately, my LG only has an optical audio out and no coaxial outputs. I need some sort of alternate method, but I keep running into a wall. Any help is greatly appreciated! Edit: There is no RCA or Coaxial out on this TV, that is why I need the headphones to have an optical input.

Answer: Optical is used to transfer 5.1 sound. If you just listen to stereo, why would you need a 5.1 input? Analog RCA or headphone out should work out just fine.

Question: What are three properties of optical fibres that make them suitable for carrying information? What are three properties of optical fibres that make them suitable for carrying information? I tried looking on the internet, but couldn't find anything :( Help please!

Answer: Less expensive - Several miles of optical cable can be made cheaper than equivalent lengths of copper wire. This saves your provider (cable TV, Internet) and you money. Thinner - Optical fibers can be drawn to smaller diameters than copper wire. Higher carrying capacity - Because optical fibers are thinner than copper wires, more fibers can be bundled into a given-diameter cable than copper wires. This allows more phone lines to go over the same cable or more channels to come through the cable into your cable TV box. Less signal degradation - The loss of signal in optical fiber is less than in copper wire. Light signals - Unlike electrical signals in copper wires, light signals from one fiber do not interfere with those of other fibers in the same cable. This means clearer phone conversations or TV reception. Low power - Because signals in optical fibers degrade less, lower-power transmitters can be used instead of the high-voltage electrical transmitters needed for copper wires. Again, this saves your provider and you money. Digital signals - Optical fibers are ideally suited for carrying digital information, which is especially useful in computer networks. Non-flammable - Because no electricity is passed through optical fibers, there is no fire hazard. Lightweight - An optical cable weighs less than a comparable copper wire cable. Fiber-optic cables take up less space in the ground. Flexible - Because fiber optics are so flexible and can transmit and receive light, they are used in many flexible digital cameras for the following purposes

Question: How do I get my optical drive to stop sticking? Over the years, the death of my optical drives is usually the same issue- it stops ejecting properly and I get pissed and curb it. Device is still being recognized, still reads and writes disks fine, everything about it is fine, except when I hit the eject button I hear it try to eject and it sounds like the tray is hitting the housing. I can use a paper clip to eject it, and everything else is fine, but this gets to me. Is there a fix for this?

Answer: It is hard to answer for your current drive without seeing it. However for subsequent drives you may get there are several things you can do. -Consider getting an external; optical drive to avoid this issue all together. -Consider getting a slot drive rather than a tray drive, this way you never need to eject the tray just get the disks out, also avoids your issue.

Question: What is the difference between optical zoom and digital zoom on a digital camera? I want to be able to zoom in and take clear pictures, so do I buy a camera with more optical or digital zoom?

Answer: get optical zoom. optical zoom is a real zoom, where the lenses make the image larger. digital zoom is taking the whole picture, selecting a small part of that, and then enlarging that part without an increase in picture quality.

Question: How do you find the optical purity of a compound when given the known and experimental specific rotation? For example, an S enantiomer has a specific rotation of +24. A commercial sample was found to have a rotation of +16. What is the optical purity of the mixture and the percentages of S and R enantiomers in the mixture?

Answer: A racemic mixture of the compound would have a specific rotation of 0, and would be a 50-50 mixture of the two forms. The commercial sample has a rotation 2/3 of the pure S form. Since the total range of rotations of different mixtures would be 48 degrees (-24 to +24), it is 1/6 R form (8/48) and 5/6 S form. Just convert those fractions to percentages, and you've got it.