Powering a 13W CFL light bulb using a 3V battery - YouTube
Recently we stumbled upon this cheap high voltage converter on Amazon
which claims a boost from 3-6V to 400kV.
Although really skeptical
about the 400kV claim, a lot of comments indicated that it did boost at the very least to 10kV so we got one of these to test it out.
Schematic diagram for lighting up a CFL using the high voltage converter
Using a 1.5V battery to power the circuit
Using a 3V battery to power the circuit
And boom! There we go, that’s how you light up a CFL light bulb using a 3V battery!
If you do have access to a plasma globe or a tesla coil, things become a little bit more simpler:
Wireless (but not free) means to power a CFL light bulb
The way CFL light bulbs works is by exciting the electrons in the lamp and when they return to the ground state they radiate ultraviolet light. This emitted light is converted to visible light when it strikes the fluorescent coating on the glass.
So it really does not matter how you decide to excite the electrons to the higher energy state. It might be a high voltage converter, a tesla coil, a plasma globe, etc but all you need is a device that will kick those electrons inside the bulb from their ground state to the higher excite state. That’s all you need!
This is a question we have been asked over a hundred times.
And many a times from teachers and educators who have told us that they were hesitant to share our content to a younger audience because it had a curse word and requested an another means to share the same content.
After months of ‘Yup, we will do that soon’, we finally managed to back up all our tumblr content on to our sister blog - ‘Ecstasy Shots’.
(we are still working on the formatting of the backed up posts which are a bit off, but they are available)
How does this work?
We will continue to post on Tumblr. But whenever we post on Tumblr, a backed up version of the post should appear on Ecstasy Shots! within a day or so that you can share it anybody.
We understand that this may not be the optimal solution, but nevertheless hopefully this addresses the issue at hand.
- The reason why it produces arcs is due to a phenomenon called Capacitive Coupling and is a bit involved. But we will explore that in a future post. In the meantime, you can find a great explanation about it here.
This week NASA released the first-ever image of shock waves interacting between two supersonic aircraft. It’s a stunning effort, requiring a cutting-edge version of a century-old photographic technique and perfect coordination between three airplanes – the two supersonic Air Force T-38s and the NASA B-200 King Air that captured the image. The T-38s are flying in formation, roughly 30 ft apart, and the interaction of their shock waves is distinctly visible. The otherwise straight lines curve sharply near their intersections.
Fully capturing this kind of behavior in ground-based tests or in computer simulation is incredibly difficult, and engineers will no doubt be studying and comparing every one of these images with those smaller-scale counterparts. NASA developed this system as part of their ongoing project for commercial supersonic technologies. (Image credit: NASA Armstrong; submitted by multiple readers)
How do these images get captured?
It may not obvious as to how this image was generated because if you have heard about Schlieren imaging what you have in your head is a setup that looks something like:
But how does Schelerin photography scale up to capturing moving objects in the sky?
When viewing objects through the exhaust gases emanating from the nozzle
of aircrafts, one can observe the image to be distorted.
Hot air is less dense than cold air.
And this creates a gradient in the refractive index of the air
Light gets bent/distorted
Method-01 : BOSCO (
Background-Oriented Schlieren using Celestial Objects )
You make the aircraft whose shock-wave that you would like to analyze pass across the sun in the sky.
NASA (BOSCO) Live - YouTube
You place a hydrogen alpha filter on your ground based telescope and observe this:
Notice the ripples that pass through the sunspots
The different air density caused by the aircraft bends the specific wavelength of light from the sun. This allows us to see the density gradient like the case of our heat wave above.
can now calculate how far each “speckle” on the sun moved, and that gives
us the following Schlieren image.
**** This post obviously oversimplifies the technique. A lot of research goes into the processing of these images. But the motive of the post was to give you an idea of the method used to capture the image, the underlying science goes much deeper than this post.