Power of lasers
Usually, the power of lasers is expressed in mJ (millijoules) or otherwise in thousandths of a joule. Joule is rather an abstract measure of energy in physics. It's important for us to understand the joule as some amount of heat, energy
So, 1 J = 0.2388 calories and, conversely, 1 calorie = 4.186 J. The word "calorie", I think, is familiar to everyone here, but I will try to explain what it's in terms of physics.
1 calorie is a measure of the energy that is needed to heat 1 gram of water per 1 degree Celsius. In general, this is a very small amount of energy, but let's try to think about it with the laser physics point of view and calculate:
So, 1 J = 0.2388 calories and, conversely, 1 calorie = 4.186 J. The word "calorie", I think, is familiar to everyone here, but I will try to explain what it's in terms of physics.
1 calorie is a measure of the energy that is needed to heat 1 gram of water per 1 degree Celsius. In general, this is a very small amount of energy, but let's try to think about it with the laser physics point of view and calculate:
In lasers, on average, the power is expressed in 1000 mJ, sometimes 1600 mJ or even 2000 mJ (but here you shouldn't be happy, in fact there is much less power)
1000 mJ = 1 Joule
1000 mJ = 1 Joule
Pulse power = pulse energy: pulse duration. Here we are interested in the peak power that the laser produces, roughly speaking, the peak power of the pulse. To make it easier for us to consider, I suggest dividing 1 J for 1 nanoseconds. We get 1 gigawatt. But it's hard to imagine it in life. Can you describe how much it is, 1 GW?
If not, then carry on reading!
If not, then carry on reading!
Turning on the imagination
1 GW = 10% of the power of the rocket engines.
Can you imagine that you have spaceshuttle's 1/10 in your hands ?!
1 GW = 50% of the capacity of the Hoover Dam hydropower (USA).
The same question: you have half of the huge hydroelectric power station in your hands, did you realize this?
1 GW = 10 jet fighter engines!
I think that I could stop asking questions at that point :)
Can you imagine that you have spaceshuttle's 1/10 in your hands ?!
1 GW = 50% of the capacity of the Hoover Dam hydropower (USA).
The same question: you have half of the huge hydroelectric power station in your hands, did you realize this?
1 GW = 10 jet fighter engines!
I think that I could stop asking questions at that point :)
And my most favorite example, again from everyday and familiar to everyone. One iron has a power of about 2500 watts. Just try to guess how many irons you need to turn on, so that their total power is equal to the neodymium laser.
Supposed?
Here is the answer: 400,000 of those!
I hope that this article has guided you to certain reflections about how huge your device impact the clients' skin. To sum up, it is not difficult to understand why these lasers belong to the IV class of danger and why one must be incredibly cautious and savvy in their use!
Tune with me, I will continue to create useful and unconventional content especially for you;)
P.s. Always waiting for your feedback, tell me how you compare!
Tune with me, I will continue to create useful and unconventional content especially for you;)
P.s. Always waiting for your feedback, tell me how you compare!
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Educational license No. 6558 of January 17, 2017.
Teacher Vitaly Mikryukov, PhD of Medicine
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Teacher Vitaly Mikryukov, PhD of Medicine
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