Name: Philip R.
I am a student in England and need your help, I am
currently running an investigation to see whether steel has comon
reflective properties as a mirror has, I know that the Energy given out
from a bulb is 1/r(squared) but i am not sure how to follow this equation
when it is reflected off a mirror into a L.D.R. Please can you help me?
If the surface is flat and perfectly shiny, then 1/r^2 still applies, with r
being the total distance traveled: distance to the mirror added to distance
back from the mirror. If the surface is curved, thing are a bit more
complicated. Use optics to locate where the image being seen in the mirror
is located. For "r", use the distance from the final image to the location
of the device measuring the intensity. If using lenses, you may have to
allow for energy lost in the lens.
Dr. Ken Mellendorf
Illinois Central College
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Update: June 2012