*This Demonstration Requires the use of a webcam which has acess to glowdoodle.com*
many possible uses for this demonstration tool, but I used it to
demonstrate application of Stefans-Boltszmans law and
demonstrating that by the
use of our knowledge of physics we can acess information outside of the
website glowdoodle.com and a webcam I used the RGB LED thermometer to
paint pictures of the thermal landscape of the class
room. It is very engaging,
for the students, and perhaps a good demo for the start of a unit as it
leaves students excited about and aware of the
applications of physics.
My demonstration followed the following format:
1. turn off all lights(including the projector) and close blinds.
around the classroom show how the device works, shine on hand, shine on
laptop at front of class room and get students to sit/stand around it
so that they may see the screen.
painting the classroom, and kids in field of view of the webcam. (you
will have to repeatidly tell the students to close their eyes while
you paint thier heads as they reallly want to
watch themselves apear on the computer screen)
5. Then do a
portrait. Get student to hold something cold in one hand and hot in the
other and stand by him/her self infront of the camera.
Give the student a black sweater and black gloves as
it helps generate a better pictures. Quickly paint the student and
background, and allow
students to see the picture.
6. I let
students tell me what they thought would be colder, the metal sheet in
the classroom or the classroom wall. Most students said that it
would be the
metal sheet. When tested both were the same temperature. Students then
realised that was the diference in conductivity that
us think that the metal was colder, but in reality the surface
tempartures are the same.
Here is a powerpoint
presentation that I used to lead into the presentation, the goal of the
presentation was to leave students with a sense of
how much information is
outside of the human perspective and how physics can increase the
amount of information at our disposal.