Projects?

Who wants to present the group project on Wednesday (10 mins)?

A. Yes

B. No

C. Maybe

Class Q: Is it physically possible for other forms of life (non-carbon based) to exists? and how?

Q Class: How are the cells in our retinas able to detect many different wavelengths of light?

On the white slide I saw a

A. I saw a yellow cross

B. I saw a blue cross for 1-3 s

C. I saw a blue cross for 4-10 s

D. I saw a blue cross for 11-20s

E. I saw a blue cross for over 20s

On the white slide I saw a

A. I saw a red text

B. I saw a blue text for 1-3 s

C. I saw a blue text for 4-10 s

D. I saw a blue text for 11-20s

E. I saw a blue text for over 20s

Which after image of the background Green did you see?

Rank Responses

1 11

2 12

3 1

4 5

5 6

6 Other

12

3

4

5

678

9

10

11

12

Complementary colors

Wikiwww.davidcalabrese.com

Human eye has 4.5 million cone cells and 90 million rod cells

Negative afterimages due to overstimulation of the rods and cones, which leads to

loss of sensitivity in the original pattern (color and intensity).

Positive afterimages: short lived due to persisting activity.

Can we detect individual photons?

CCD light detection (by Willard Boyle – Nobel laureate and McGill graduate)

Wiki: Charge-coupled device

www.astro.cardiff.ac.uk

Single photon detection using long superconducting wire:

Wikiwww.davidcalabrese.com

Human eye has 4.5 million cone cells and 90 million rod cells

Wikiwww.davidcalabrese.com

Human eye has 4.5 million cone cells and 90 million rod cells

Different color sensitivity:

psns

Source: Rachel Casiday and Regina Frey

hyperphysics.phy-astr.gsu.edu

How many frames per second can a human eye see?

Rank Responses

1 100

2 60

3 5

4 0.01

5 10

6 Other

Cyborg video