Space Explorers

In this week's laboratory, we expand upon our knowledge that the pupil dilates or contacts based on illumination. We seek a quantitative measure of the range of pupil diameter as a function of light intensity.

We are able to continuous graph brightness, in units of lux, using a light sensor (in this case by Venier). We photograph the extent of dilation using a digital camera, with a standard ruler next to the face in order to translate digital image pupil length in pixels into actual length.