How do insects see flowers?

Flowers, such as this Narcissus Pseudonarcissus flower (i.e., a daffodil), look startlingly different in UV (Ultraviolet) light.   Note: UV has a wavelength of 1-400 nm, compared to 400-700 nm for Visible light, where nm stands for nanometer = 10^-9 m, or 1 billionth of a meter. nanos is the Greek word for "dwarf".

What in the world is SIGMA notation?!

This notation is used all the time in Physics and Math to represent the sum of a series of numbers.
The numbers can be as simple as 1 + 2 + 3 + 4 + 5 + ... + n,
or, in the case below, a little more complicated: 1 + 4 + 9 + 15 + ... + n^2

Write the following in Sigma notation, then write the VPython code to calculate the sum, then run the code to get the result.

(The first one is done for you..................................)

(1) Write the sum:  1 + 2 + 3 + ... + 10

IDLE 2.6.2

>>> count = 0

>>> for j in range(1,11):

        count += j

>>> print "the sum is: ", count

the sum is: 55

(Now, it's your turn....................)
(2) Write the sum:  1 + 2 + 3 + ... + 100
(3) Write the sum:  1 + 3 + 5 + ... + 99
(4) Write the sum:  1 + 2 + 4 + 16 + ... + 512
(5) Write the sum:  1 + (1/2) + (1/4) + ... + (1/1024)

Questions? send them to Dr. McCarthy ASAP.  Good luck.

Spectrogram of a Sodium-vapor city lamp

This is what a spectroscope sees when it looks at most city street lamps.Please be sure to click on the following link to review your Chemical Elements for next week's test!
http://docs.google.com/Doc?docid=0ARNbGsVH1evCZGQ5MjluM2dfNjNmdGpxY2RjYw&hl=en