2 things:
1. How can I determine the wavelength of a particular light falling on my LDR?
2. How can I measure the intensity of the light falling on my LDR?
My prior investigations were RUBBISH, so any help appreciated, answers on a postcard please! (Or in the boxes below).
2007-04-19 05:17:35 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
USE A CARPENTERS LEVAL LAZZER POINT.
2007-04-19 05:23:39 · answer #1 · answered by vintagemale1951 5 · 0⤊ 0⤋
I could guess how to measure the intensity of light...
You need to calibrate the LDR.
Shine light of known intensities (incrementing from 0 intensity to a higher amount) on the LDR and measure the corresponding resistance.
Graph the results and use the graph to find the intensity.
No idea how to measure the wavelength though...
2007-04-19 08:47:50 · answer #2 · answered by Pete 4 · 0⤊ 0⤋
For wavelength use the light source and shine it on a diffraction grating in a spectrometer. Take the measurements and do the sums.
2007-04-19 21:35:52 · answer #3 · answered by Pete WG 4 · 0⤊ 0⤋
you place a shade clear out between the source of light and the sunshine based Resistors (LDR), and evaluate the resistance with the clear out to the resistance without the clear out.
2016-12-29 10:07:36 · answer #4 · answered by husaini 4 · 0⤊ 0⤋
'Okay, so' adds nothing to your question.
What is an LDR?
2007-04-19 08:39:06 · answer #5 · answered by Frank N 7 · 0⤊ 0⤋