How Can You Measure Light Intensity Variation with Wavelength Using an LDR?

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To measure light intensity variation with wavelength using a Light Dependent Resistor (LDR), a lab experiment can be designed that involves selecting different wavelengths from a lamp. The wavelength can be determined using filters or a polaroid disc, while the LDR can measure the intensity of light by converting it into a resistance change. It's crucial to control factors such as distance from the light source and ambient light to ensure a fair test. Safety precautions should be taken when handling electrical components and light sources. The experiment should focus on accuracy and reliability to yield valid results.
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Homework Statement


Design a lab experiment using a LDR to investigate how the intensity of light emmited by a lamp varies with wavelength



Homework Equations



how the wavelength of the light falling in the LDR is determined
how a measure of the intensity can be obtained from the LDR
factors to be controlled to ensure it's a fair test, safety precautions and particular features to ensure accuracy and reliability

The Attempt at a Solution

 
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Welcome to the forums! You must make some attempt at the problem yourself before we can help you. What ideas do you have about the experiment? For example how can you select different wavelengths from a lamp and what is it about the LDR that could be used to measure intensity?
 
i could use a polaroid disc to measure the wavelength
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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