Question about wavelength and power

FUBeaches said:

i'm not a pro at this but i remember shorter wavelength have higher frequency.(frequency is a rate which energy is transfer over the period time). Violet have frequency of 8 x10 to the power of 14 while Red have 4 x 10 to the power of 14 which means a 405nm laser will deliver twice as much photons compare to 660nm at any given time.

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Encap said:

Yes---some X-ray photons carry enough energy to ionize atoms and disrupt molecular bonds. Most X-rays have a wavelength ranging from 0.01 to 10 nanometers. X-rays with photon energies above 5–10 keV (below 0.2–0.1 nm wavelength) are called hard X-rays, while those with lower energy are called soft X-rays. soft X-rays x-rays with E<1keV cannot penetrate a sheet of paper

X-rays don't penetrate everything---there is a whole range of x-ray wavelengths of different photon energies--the penetration depth varies with several orders of magnitude over the X-ray spectrum.
Xrays can be reflected --here is one way: X-ray Mirror and there is a whole field called x-ray optics see: https://en.wikipedia.org/wiki/X-ray_optics ---see also：CXRO X-Ray Interactions With Matter

and can actually be seen by the human eye, reportedly. See below
"While generally considered invisible to the human eye, in special circumstances X-rays can be visible. Brandes, in an experiment a short time after Röntgen's landmark 1895 paper, reported after dark adaptation and placing his eye close to an X-ray tube, seeing a faint "blue-gray" glow which seemed to originate within the eye itself. Upon hearing this, Röntgen reviewed his record books and found he too had seen the effect. When placing an X-ray tube on the opposite side of a wooden door Röntgen had noted the same blue glow, seeming to emanate from the eye itself, but thought his observations to be spurious because he only saw the effect when he used one type of tube. Later he realized that the tube which had created the effect was the only one powerful enough to make the glow plainly visible and the experiment was thereafter readily repeatable. The knowledge that X-rays are actually faintly visible to the dark-adapted naked eye has largely been forgotten today; this is probably due to the desire not to repeat what would now be seen as a recklessly dangerous and potentially harmful experiment with ionizing radiation. It is not known what exact mechanism in the eye produces the visibility: it could be due to conventional detection (excitation of rhodopsin molecules in the retina), direct excitation of retinal nerve cells, or secondary detection via, for instance, X-ray induction of phosphorescence in the eyeball with conventional retinal detection of the secondarily produced visible light." from htthttps://en.wikipedia.org/wiki/X-ray

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Encap said:

For a constant amount of total energy, say 50mW...

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FUBeaches said:

Violet have frequency of 8 x10 to the power of 14 while Red have 4 x 10 to the power of 14

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FUBeaches said:

a 405nm laser will deliver twice as much photons compare to 660nm at any given time.

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FUBeaches said:

i'm not a pro at this but i remember shorter wavelength have higher frequency.(frequency is a rate which energy is transfer over the period time). Violet have frequency of 8 x10 to the power of 14 while Red have 4 x 10 to the power of 14 which means a 405nm laser will deliver twice as much photons compare to 660nm at any given time.

Click to expand...

Cyparagon said:

mW is a unit of power, not energy.

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