By Matin Durrani

Can you tell what branch of physics is being described on the blackboard above? It’s one of six photographs taken by the communications folks at the Perimeter Institute for Theoretical Physics in Waterloo, Canada, where blackboards are an integral feature of the building’s design, appearing everywhere from the lifts to coffee areas.

In this quiz, your task is to study six blackboards and match them up with the physics topics they represent. There’s no prize, other than the satisfaction of having at least some inkling of what those clever theorists at the Perimeter are up to.

So here are the six topics:

• Accretion physics and general relativity

• Cosmology

• Neural networks and condensed matter

• Particle physics 1

• Particle physics 2

• Strings

And here are the six blackboards (you can click on each to see it in more detail).

We’ll reveal the answers at the end of the month. In the meantime, please don’t spoil the quiz for others by revealing the answers in the comments.

You can find out more about the power of blackboards in a great feature in the June 2017 issue of Physics World by science writer Philip Ball, who reckons that the blackboard still

retains an aura and usefulness for physicists that more advanced technologies can’t match.

You can read the article online here and in the June issue, which is now live in the Physics World app for mobile and desktop. It includes thoughts from Lauren Hayward Sierens, a condensed-matter physicist at the Perimeter Institute, who once appeared as part of a “live blackboard” artwork.

Remember that if you are a member of the Institute of Physics, you can read Physics World magazine every month via our digital apps for iOS, Android and Web browsers.