Reflected light beams from a point source located where the rim touches the positive $x$-axis
More from Chalkdust
Read Issue 15 now!
Squid Game, hidden harmonies and DnD coming your way in our brand new issue! Plus all your favourite puzzles & columns.
In conversation with Sammie Buzzard
Ellen talks to the mathematician and scientist about Attenborough, arctan and Antarctica
Prize crossnumber, Issue 15
Win a £100 Maths Gear goody bag by solving our infamous puzzle
Surviving the bridge in Squid Game
E Adrian Henle, Nick Gantzler, François-Xavier Coudert & Cory Simon team up for a deadly challenge
Dear Dirichlet, Issue 15
Weddings, holidays and catfish find their way into the prof's postbox this issue.
Accidentally mathematical songs
Goran Newsum always should be someone you really love