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Investigating how distance affects the light shining on the L.D.R.
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G.C.S.E Physics LDR Coursework Planning I am investigating how distance affects the light shining on the L.D.R. An L.D.R is a light dependent resistor (LDR) is not so easy to see. It is a component that has a small transparent end which is sensitive to light. A change in the amount of light falling on it changes its resistance. This change in resistance can be used to switch a circuit on or off. They are used in street lamps to switch them on in the evening and off in the morning. One other use is on bowling alleys. If your foot slides past the foul line, then you break a beam of light across this line. The LDR reacts to this, and a buzzer sounds. Similarly LDR's can be used in burglar alarm circuits. The Input is the distance of the bulb from the L.D.R. The out put is the mA. These are some variables that...
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