name a device that converts the change in intensity of illumination into charges in electric current. give three applications of this device.

i donot know sorry
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its ok
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@ janvi 

the device is the LED ..

it changes the illumination of intensity into electric charge or current ..

1- its used in everywhere such as the decoration lights ,and the remote of tv ,

2- it can be used in place of cfl bulb .

3- its used in burglar alaram also ..

it have a low warmup time and almost its giving the high intensity of light ..


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Photocell In camera Streetlight Counting devices
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Photo cell used in t.v,,determination of planck s'constant,fire alarm
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