Lab 13-tue. 1pm sec B

Data: Q1) Take a reading of the output of the amplifier with NO LIGHT on the detector. This is your dark reading, a number which should be subtracted from your data. 2.100 microwatts (Q2) Take readings of the output of the amplifier, with light through the lens, as you change the F/#. Do this for all of the F-stop "click-settings," including the intermediate unmarked ones. Start at the smallest F-stop (either 3.4 or 3.5 on these lenses). Uknown F#'s (Intermediates) Power(Microwatts) 2 106.23 3 79.2 5 40.85 7 15.62 9 8.42 (Q3) Process your data in the following manner: -- subtract the dark reading from each of your data points -- normalize your data to the value at the smallest F-stop (either 3.4 or 3.5) by dividing all of your output readings by the largest reading, namely the one obtained at the smallest F-stop. dark Readin g reading s of amplifie r f# Normalize d Values Power (Microwatts)f/3 .4 f# Diameter of Aperture Stop Normalize d Values F/3.4 Area of Apertur e stop 2.1 112.52 3. 4 1 110.42 3. 4 20.5882352 9 1 332.911 62.85 5. 6 0.55017207 5. 6 12.5 0.36862244 9 readings of amplifier f# 128.52 3.4 57.16 5.6 29.18 8 11.81 11 5.97 16 4 22