Internet-Safe Illustrations HQ(ISafeHQ)

There are wonderful scientific animations on the internet but it is many a times very hard to discern if they can be used anywhere you like without copyright infringements.

ISafeHQ is a project that was started in October 2019. The aim of this project is to build a database of high quality (mainly physics) illustrations, animations and demonstrations that educators/teachers/science-communicators can use for any purpose (class, lectures, talks, etc) for free under a Creative Commons Attribution 4.0 International License (click on the link to learn more about the licence)
Please attribute this project,as :” Source: ISafeHQ on cosmicnoon.com” wherever you decide to use these illustrations

This work is licensed under a Creative Commons Attribution 4.0 International License.

Progress:

50 illustrations reached (images: 18 , gifs: 26 , videos: 6 ) – December 31, 2019
75 illustrations reached (images: 26 , gifs: 40 , videos: 9) – January 18, 2020
100 illustrations reached (images: 32 , gifs: 55 , videos: 13) – April 10,2020
125 illustrations reached (images: 42 , gifs: 59 , videos: 24) – May 22,2020
~~Goal : 125 illustrations by June 2020 (Current progress – 129(images: 44 , gifs: 60 , videos: 25).~~

[update: October 2022] : Several of the following gifs have been released in video format on YouTube under the same Creative Commons Attribution 4.0 International License. You can find them here.

Contributors :
Keerthi Vasan GC
Guram Mikaberidze

Astronomy:

Electricity and Magnetism:

Optics: Reflection, Total Internal Reflection and scattering

Submerging Polymer balls in a bowl of water creates an interesting illusion which makes the spherical balls appear as 2D circles.

Optics + Thermodynamics: Heat haze

Heat haze off the engine from an airplane

Optics: Lenses

A lens although transparent in the optical can be opaque in the infared

Optics: Mirrors

The back of a spoon is probably the simplest example of a convex mirror

Same spoon demo but shot with an infrared camera instead to prove that the same physics applies in the infrared as well

The inner side of the spoon is the simplest example of a concave mirror

Optics: Diffraction and Interference

Diffraction pattern obtained from a helical spring (A) with central maxima (B) with central maxima covered with a finger.
The “X” shaped diffraction pattern is expected from a spring since when we look at a spring headon looks like:
\
/
\
/
\
/
And each of the ‘/’ and ‘\’ contribute to the final diffraction pattern.

Plot of position vs pixel value for the diffraction pattern obtained above.

Light: Near UV spectrum

Thermodynamics: Heat and Temperature

Thermodynamics: Convection

Setup for demonstrating Convection cells. Thermal camera is mounted to a smart phone and the images are captured from the top. Below are how the convection cells look like:

Convection cells formed when cold milk is added to warm water

Close up of one of the convection cells formed

Instead of a cup, a pan is used in this case to visualize the convection cells. The region in consideration is marked in white.

Thermodynamics: Lighters and Fireworks

Heat haze off the engine from an airplane (#1)

Fluid Dynamics:

Fluid Dynamics: Instabilities

Plateau-Rayleigh Instability (frame-by-frame)

Using a laser to cut through a boiling pot of water

Fluid Dynamics: Pilot wave hydrodynamics

Quantum Mechanics:

Scattering of a Gaussian wavefunction(#1)

Random Engineering:

Sound:

Special Topics : Plasma globe

Special Topics: Photoelasticity

In all of the following images and gifs, the object is placed between two polarizers. One is placed on the camera and the other is placed on the source of light.