Infinite square well (particle in a box)

Infinite square well (particle in a box)

Announcements:

? Homework set 8 is posted

and is due next Wednesday,

Oct. 30.

? Still have homework to return

Today we will be

investigating the

infinite square well

(particle in a box).



Physics 2170 ¨C Fall 2013

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Identities

eikx= cos kx + i sin kx

e-ikx= cos kx - i sin kx = 1/eikx

cos kx = (eikx + e-ikx)/2

sin kx = (eikx - e-ikx)/2i



Physics 2170 ¨C Fall 2013

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Interesting Facts for Friday

Chewing gum was invented by a dentist,

named William Semple - as a way to

exercise your jaws. First person to patent

chewing gum in 1869. Adams patented

chicle gum that people now spend 2 billion

dollars a year on. Was originally made by

tapping trees, now done chemically.

A solar panel 100 miles by 100 miles (161x161km) in the

Mojave Desert (USA) could replace all the coal now burned to

generate electricity in the entire U.S.



Physics 2170 ¨C Fall 2013

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Interesting Friday Facts cont.

Lake Baikal in

Russia contains

more water than

all the North

American Great

Lakes combined.

One fifth of all

fresh water in the

world is

contained in Lake

Baikal. It is 400

miles long!



Physics 2170 ¨C Fall 2013

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More facts cont.

Mexico City is sinking at a rate of 18 inches (46cm) per

year as a result of draining water.

The first ten feet of the ocean hold as much heat as the

Earth's entire atmosphere.

Hawaii is moving toward Japan at 10 centimeters (4 inches)

every year.

The temperature in Fahrenheit can be

determined by counting the number of cricket

chirps in 14 seconds and adding 40. Comes

from the Farmers Almanac



Physics 2170 ¨C Fall 2013

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