Topic: [IDEA] Anti-Arrest Vest (Read 5230 times)

Quote from: Xenland on July 24, 2012, 10:49:52 AM

If you have that many lazes I'd assume they don't need to be high powered because all of them combined will be low powered.. I've stared at low powered lasers as a kid no harm done Tongue

Do you have any idea how powerful 1.8 watts of concentrated laser energy is? For comparison, a cheap laser pointer will be between 3 and 5 milliwatts. 1800 milliwatts will burn on contact with a variety of materials, including skin, rubber, wood, and more.

Isn't it more accurate to use amps instead of watts? watts is a meta-measurement Tongue

Nnnnooo...... No. Amps is watts divided by volts, and light doesn't have "volts" as such.

What if i have low amps and high volts? or high volts and low amps? I'm saying watts is too ambiguous to use as a measurement tool, im almost not sure why anyone still uses it as a measurement.

Watt is the SI unit of power, regardless of whether it is electricity, light, or heat. When a laser is rated at 1.8W, that is the actual power output in light, which means that at 445nm there are 4x10^18 photons leaving the laser diode each second each with an energy of about 4.46x10^-19 J. I don't know where you're getting your information from, but it's not correct.

Edit: Rereading I think I get what you're saying, which is that the watt is a derived unit and not a base unit, while the amp is. That doesn't mean the amp is a more accurate or better way of rating the light output though, any more than you would rate a 5000W propane heater in amps instead of watts.

Okay i see what i missed, I assumed we are discussing electricity but you are acknowledging that the actual light output it self can be measured in jouls which can apparently be measured in watts of light as well. I had assumed we were talking about electrical outputs i didn't know that’s how lazers were rated in terms of power(light).

Learn something new every day!

MrTeal

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Quote from: rjk on July 24, 2012, 10:29:38 AM

Quote from: Xenland on July 24, 2012, 10:49:52 AM

If you have that many lazes I'd assume they don't need to be high powered because all of them combined will be low powered.. I've stared at low powered lasers as a kid no harm done Tongue

Do you have any idea how powerful 1.8 watts of concentrated laser energy is? For comparison, a cheap laser pointer will be between 3 and 5 milliwatts. 1800 milliwatts will burn on contact with a variety of materials, including skin, rubber, wood, and more.

Isn't it more accurate to use amps instead of watts? watts is a meta-measurement Tongue

Nnnnooo...... No. Amps is watts divided by volts, and light doesn't have "volts" as such.

What if i have low amps and high volts? or high volts and low amps? I'm saying watts is too ambiguous to use as a measurement tool, im almost not sure why anyone still uses it as a measurement.

Watt is the SI unit of power, regardless of whether it is electricity, light, or heat. When a laser is rated at 1.8W, that is the actual power output in light, which means that at 445nm there are 4x10^18 photons leaving the laser diode each second each with an energy of about 4.46x10^-19 J. I don't know where you're getting your information from, but it's not correct.

Edit: Rereading I think I get what you're saying, which is that the watt is a derived unit and not a base unit, while the amp is. That doesn't mean the amp is a more accurate or better way of rating the light output though, any more than you would rate a 5000W propane heater in amps instead of watts.

rjk

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1ngldh

What if i have low amps and high volts? or high volts and low amps? I'm saying watts is too ambiguous to use as a measurement tool, im almost not sure why anyone still uses it as a measurement.

You can't measure light with amps, it doesn't work. You could measure the amount of power it takes to drive the laser diode, but that isn't necessarily relevant.
They are different units, used in different applications. Amps is a measure of current, which is a rate of flow, and exists as an effect of voltage (electromotive force).

A watt is a measurement of energy, which is power (one joule) over a period of time (one second).

Xenland

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I'm not just any shaman, I'm a Sha256man

Quote from: rjk on July 24, 2012, 10:29:38 AM

Quote from: Phinnaeus Gage on July 23, 2012, 10:09:43 PM

If you have that many lazes I'd assume they don't need to be high powered because all of them combined will be low powered.. I've stared at low powered lasers as a kid no harm done Tongue

Do you have any idea how powerful 1.8 watts of concentrated laser energy is? For comparison, a cheap laser pointer will be between 3 and 5 milliwatts. 1800 milliwatts will burn on contact with a variety of materials, including skin, rubber, wood, and more.

Isn't it more accurate to use amps instead of watts? watts is a meta-measurement Tongue

Nnnnooo...... No. Amps is watts divided by volts, and light doesn't have "volts" as such.

What if i have low amps and high volts? or high volts and low amps? I'm saying watts is too ambiguous to use as a measurement tool, im almost not sure why anyone still uses it as a measurement.

memvola

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Pizza Delivery Man Fitted With A Collar Bomb

Why not use a real bomb?

Mutually assured destruction saved the world a lot of headaches. Yes, early adopters would perish, but once it gets wide acceptance, I bet it would statistically be less harmful than getting arrested.

I can imagine a peaceful world where everyone has a fission bomb attached to their necks.

rjk

sr. member

Activity: 448

Merit: 250

1ngldh

If you have that many lazes I'd assume they don't need to be high powered because all of them combined will be low powered.. I've stared at low powered lasers as a kid no harm done Tongue

Do you have any idea how powerful 1.8 watts of concentrated laser energy is? For comparison, a cheap laser pointer will be between 3 and 5 milliwatts. 1800 milliwatts will burn on contact with a variety of materials, including skin, rubber, wood, and more.

Isn't it more accurate to use amps instead of watts? watts is a meta-measurement Tongue

Nnnnooo...... No. Amps is watts divided by volts, and light doesn't have "volts" as such.

Xenland

legendary

Activity: 980

Merit: 1003

I'm not just any shaman, I'm a Sha256man

If you have that many lazes I'd assume they don't need to be high powered because all of them combined will be low powered.. I've stared at low powered lasers as a kid no harm done Tongue

Do you have any idea how powerful 1.8 watts of concentrated laser energy is? For comparison, a cheap laser pointer will be between 3 and 5 milliwatts. 1800 milliwatts will burn on contact with a variety of materials, including skin, rubber, wood, and more.

Isn't it more accurate to use amps instead of watts? watts is a meta-measurement Tongue

rjk

sr. member

Activity: 448

Merit: 250

1ngldh