This wonderful Bird of Peace has been designed by the famous Origamist Paul Jackson. This bird is a great symbol of peace. You can fold it from a card sheet and stand it on your table. It is a gift which your friends will deeply cherish.
The magnetic Dancing Dolls will keep very child enraptured for hours. The dolls are light make of wood, color wool and wire. In the base is a steel screw. Place the dolls on a card sheet and move a magnet from below. The dolls move left, then right and sometimes hold each others hands and dance a duo.
THIS PENCIL SPINS, LEVITATES AND WRITES !!!
This story more than 100 years old. In 1904 Sherlock Holmes the famous detective based in London investigates a murder. Next to the site of the murder are cycle tracks, on a muddy road from the school and the village. And only if they could figure out the direction of the cyclist based on the track, they can nab the culprit. Watson as usual is not sure. “This track, as you perceive, was made by a rider who was going from the direction of the school.” “Or towards it?” “No, no, my dear Watson… It was undoubtedly heading away…
This incident happened many years ago when I was finishing my high school in Meghalaya, a state in India’s northeast there are lush and dense forests everywhere. I used to walk to my school with my friend everyday through a narrow 2km long path. If I had taken the road the 2km walk would become a 20 km, 1hr bus ride. This was because the closest road-bridge was far away. Also the path to my school had an amazing tree bridge which is now famously called the living tree bridges of Meghalaya. These bridges are made from aerial roots…
And how does gas pressures determine effects when high voltage is applied across them? Watch the video that was important in the exploration of cathode rays that eventually led to the discovery of the electron by JJ Thomson
In part 2 of my MRI series, I discuss how an external magnetic field affects the magnetic moment of the hydrogen nucleus. In particular, how it aligns and precession. Both are explained at length in a non technical fashion
One of my students asked me to quickly review a bone scan with an X-ray image. Here is a quick video I produced
CAT or CT scans are used to achieve high resolution images inside the body. But how do they work? Watch the video to find out
Reviews how an A brightness (B) scan is produced in the context of ultrasound/sonograms
Reviews how an A amplitude (A) scan is produced in the context of ultrasound/sonograms
An intro to ultrasound (sonograms) and the underlying factor (acoustic impedance) that determines how an image is formed.
Want to know how the eye focuses or accommodates? This video goes through the physics of accommodation, how the eye adjusts in order to produce a sharp image on the retina. It also covers long and short sightedness and how to fix them.
In this video I cover the difference between the two lens types and how they produce virtual images.
In this video, I go through refraction using the excellent animation from pHET (http://phet.colorado.edu) I discuss the basics of refraction as well as Snell’s Law.
This video covers how crystals are used to create and receive high frequency sound. Apart from their use in small speakers, they are especially useful in their used of transducers for ultrasound imaging.
How do you make a current carrying wire into an electromagnet? This video explains the physics of the solenoid, covering both the shape and size of the magnetic field it generates
What is an electric field? How do you draw them diagrammatically? Watch the video as I explain fields around – single charges – multiple charges – plates
A follow up of my first video on circuits, this video explores the mathematics. of circuits, with the use of Ohm’s Law to determine resistance, voltage and current, in both series and parallel circuits.
In this video I discuss AC motors, in particular, synchronous motors. I then lead on to the physics behind induction motors