I have put together a new site to gather my various scribblings, blog posts, videos and animations etc, into one place. You can visit it here – https://www.scribblings.info I will add various bits and pieces into it from time to time. Hope you find it useful, Mike.

Last post of 2023. If you look at a river, you will quickly realise that the water flows at different speeds depending on where you’re looking. Near the river banks it usually flows quite slowly, whereas it will typically flow much faster near the centre, if unimpeded. A closer inspection reveals that the currents in… Continue reading Time is not constant – not in our universe

The great physicist, Richard Feynman, once said that if you claim to understand quantum physics, then you don’t understand quantum physics. Anyone who has studied it will tell you that it is bizarre, unfathomable and completely counter-intuitive. One of the strange issues is the wave-particle duality of fundamental ‘particles’ such as electrons and photons. When… Continue reading Waves or particles – the conundrum in Quantum Physics

When light enters the skin the photons immediately encounter atoms and molecules. With each encounter there is a probability that each photon will be either absorbed or scattered. The skin is a highly scattering medium, so the probabilities of scattering are usually much greater than the probability of being absorbed (in most events). Some of… Continue reading How does fluence vary with depth in the skin?

Something a bit different this year. With a pumpkin. And a laser… Incidentally, no pumpkins were harmed in the making of this video. Apart from that one, of course… Me bad, Mike.

I often hear people saying that “IPLs don’t work”. That’s not true. They are usually basing this on poor results which occur because of poor training. It seems to me that most people using IPLs out there are not properly trained! Hence the poor results… Here is an example of a good result with an… Continue reading “IPLs don’t work”, they say. ‘They’ are wrong. Here’s some proof…

Following on from my post of yesterday about the penetration of fluence into the skin, a few people were asking about the pain experienced by patients/clients. I had pointed out that a single pulse of 30 J/cm2 is much more effective than three pulses of 10 J/cm2 – regardless of whether its from a laser… Continue reading Pain and laser/IPL hair removal

Answer – yes!! Why? OK, so we need to look at where the light goes in the skin to answer that question… Someone asked me, recently, the above question relating to the treatment of hair. She said that she had been trained to apply three shots of 10 J/cm2 to the area, rather than one… Continue reading Is 30 J/cm^2 ‘better’ than three shots of 10 J/cm^2 in laser/IPL hair removal?