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प्रश्न
Give the applications photocell.
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उत्तर
Applications of photocells:
- Photocells have many applications, especially as switches and sensors.
- Automatic lights that turn on when it gets dark use photocells, as well as street lights that switch on and off according to whether it is night or day.
- Photocells are used for the reproduction of sound in motion pictures and are used as timers to measure the speeds of athletes during a race.
- Photocells are used to measure the intensity of the given light and to calculate the exact time of exposure.
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What is a photocell?
Mention the different types of photocells.
Explain how frequency of incident light varies with stopping potential.
List out the laws of photoelectric effect.
Explain experimentally observed facts of the photoelectric effect with the help of Einstein’s explanation.
Give the construction and working of photo emissive cell.
