Measuring light intensity with an LDR and diffraction grating

[jimbobjb]

Homework Statement

For my physics coursework, I have to design a laboratory experiment using an LDR to investigate how intensity of light emitted from a lamp varies with wavelength. In the procedure I will use diffraction gratings to separate light into wavelengths. The problem I am having is "How a measure of light intensity can be obtained from the LDR" please can anybody show me how to obtain intensity from an LDR.
thanks

Homework Equations

The Attempt at a Solution

 

[AlephZero]

You need the technical data sheet for the particular LDR part number you will be using. The data sheet will tell you how the LDR resistance changes with light intensity, and how the sensitivty of the LDR varies with the wavelength of the light.