Give examples of the use of photocells.

Turnstiles, automatic lighting switches, optical fiber, (light-to-electricity converters), remotes for audio, video and other household appliances, photo-video equipment, (cameras, cameras) for measuring brightness, solar batteries are also photocells for measuring the speed of rotation of engines.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.