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In a laser, how many nm = a mw? Answered

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rxxchii
rxxchii

1 year ago

If I wanna buy a laser ....Which is good 500nm or 500mw

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Yonatan24
Yonatan24

Reply 1 year ago

Basically, nm is the measurement of color, and mw is the measurement of brightness. But if you need to ask this, you probably shouldn't get a laser... Do your research.

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lemonie
lemonie

9 years ago


nm is a wavelength term, it's the distance between wave peaks in fractions of metres. mw is an energy term, but it links towards nm via ~Planck.
However, what you get out is proportional to what you put in, and lasers for sale generally have the mwattage given.

L


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kelseymh
kelseymh

Answer 9 years ago

What you say is true, but isn't relevant for how lasers are rated. The milliwatts refers to the power consuption (or power output), which can be the same for any wavelength. Planck's constant just tells you how many photons per second you get.

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lemonie
lemonie

Answer 9 years ago


That was the best connection between wavelength & energy I could think of at the time. I agree with you.

L

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transuranic
transuranic

9 years ago

So is 500 nm a powerful laser?

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orksecurity
orksecurity

Answer 9 years ago

500nm specifies the color. It says nothing about power.

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kelseymh
kelseymh

9 years ago

As Jack Lopez said, those are completely different parameters. Nanometers (wavelength) tells you what color the light is. Milliwatts (power) tells you how bright the light is.