Thinking @ Speed of Light

I own a book shop in Nainital and I live in a house just behind (attached to) the shop. As you enter my house there is a cupboard that we use to keep any spare cash (Small amounts that would be sent to the bank the next day) we might have form the day's sale. About 4 months back my mother started to notice money disappearing form the cupboard. First time my mum told me about the issue, I brushed it aside thinking it might have been a calculation error from our side. Then the same thing happened again another 2-3 times. This was more than a coincidence so we stopped using the cupboard for the purpose of keeping any sort of cash but we still did not know who was taking the money. We have a few staff members at our place (all of them had been with us for a considerable amount of time - some of whom had been working at our place for more than 20 years). Since the only people who had any access to the cupboard apart form the family were the staff member we suspected that one of them wa

A few days ago I was stuck in one of those YouTube loops (happens once a month) and I came across this awesome video on the  Prince Rupert's Drop  by SmarterEveryDay (Excellent channel BTW). About 3:00 minutes into the video they use something called a Polariscope to check out the stresses built up inside the Prince Rupert's Drop. Watching that I realized that I had all the things needed to build this at home. You need the following things for creating a Polariscope : 1) A polarized light source (White in color preferably) - Since almost all LCD's use polarized light to display images you could use your iPad or Laptop screen displaying a white image. I went for my 22" monitor as I needed a bigger surface. 2) A transparent object - Not all objects work well for this as some don't really have that much stress.            - Things that work well - Glass statues, use and throw forks and knives, glue sticks, etc.           - Things that don't work w

A few days ago I posted this picture of myself on facebook Loads of people asked me how I did this so I decided to make step-by-step a tutorial. It is ridiculously easy. I was going to do a video on this but then decided against it as it would have taken a lot longer and currently I don't have that much time at hand. I'm quite busy with the work @  Mistri Labs Step 1: Setup your camera. You will need camera where you can set exposure manually (Aperture Priority and Shutter Priority will not work too well in this case as the light will vary was the subject moves in the frame). Most P&S and DSLRs have this feature. Even a decent phone camera should work (You might need to download an extra app to set the manual exposure on your phone). You will need a tripod (or any surface that you can place your cam on if you don't have a tripod). - Setup the ISO - Don't use auto because the light changes as you move around the room. - Setup the aperture - For all the p