using an LDR how the intensity of light emitted by a lamp varies with wavelength?

Question

Particular attention needs to be paid to:
a-the procedure to be followed
b-how the wavelength falling on the LDR is determined
c-how a measure of light intensity can be obtained from the LDR
d- the range & precision of any instruments that would be used
e- the factors that would need to be controlled to ensure a valid test
f-any safety precautions you would take when carrying out the investigation
g-particular features of the design that would ensure accuracy & reliability of results

Answer 1

0. You will need a voltmeter, LDR, resistor matching your LDR range and a voltage source. ,
1. You must calibrate the device by employing the same source of light, same distance away and changing varying filters to obtain readings at different wavelengths.
2. The energy of light is E=hv
E- energy
h- Plank's constant
v- frequency
3. wavelength= c/v
c -the speed of light.
v- frequency
4. have fun and don't to anything crazy.

Answer 2

You also need a power source like a 9V battery and a prism. Put the LDR in series with the battery and the ammeter and measure the current. Then you need to extract the wavelengths from the lamp and you do this with a prism. Rotate the prism to select a different wavelength (ie color) to shine on the LDR. Of course an LDR is far from linear so your results will be poor and inconclusive but that is life.