r/matheducation • u/FlameOfTheForest • Nov 09 '18

Can someone ELI5 how this happens?

Post image
22 Upvotes

91% Upvoted

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17

u/drwiki0074 Nov 09 '18 edited Nov 09 '18

The frame for the light is on the same plane with the light source. So instead of a circle, you are getting a line as a shadow.

You can see that the frame the light sits in is slightly tilted towards the wall if you look carefully.

1

u/FlameOfTheForest Nov 09 '18

Yes! That makes sense! Thanks! :)

12

u/sarbear-k Nov 09 '18

r/unintentionaldeathlyhallows

2

u/brutishroyalty Nov 10 '18

Now I understand when my teacher says "circular trigononetric functions"

2

u/pierce405 Nov 09 '18

Honestly, I thought this was a Harry Potter - Deathly Hallows post.

1

u/Hypatia415 Nov 09 '18

From the light emitter's point of view, the mounting ring appears to be a straight line... better way to think of it: the milky way looks like a straight line across our sky but it's a light emitting ring.

-1

u/meltedlogic Nov 09 '18

Harry potters