Wednesday, April 14, 2010

Golden Section Afternoon

"What's at the centre of a sunflower?" asked Harold, squinting as he looked up from his recumbent position on the grass.

"The junction of two spirals, 137.52 degrees apart," said Jasfoup. "I showed that to Leonardo of Pisa, once, and it blew his mind. He wrote a paper on mathematics on it."

"On sunflowers?"

"Sort of. On the seeds, anyway. Count the seeds on a sunflower spiral and you'll get two consecutive numbers of the Fibonacci sequence. 21 seeds and 34; 55 and 89 or even 89 and 144 for a really big one."

"You've made me want a pineapple."





See also: Living with twisted willow: Sunflowers - maths, art and the pineapple

6 comments:

aims said...

I thought there was love at the center of a sunflower. Love and happiness and sunshine.

There were Cid's favourite flower you know.

Leatherdykeuk said...

Were they? How lovely!

DJ Kirkby said...

Hah! Love the random final sentence.

Leatherdykeuk said...

heh! Pinapple segments are in Fibonacci spirals too!

stephanie said...

Love this.

Leatherdykeuk said...

You like your mathematics, though!