What are the applications of LDR (light dependent resistors)?

Applications:

There are some applications of LDR which are given below.

• The LDR is used in the infrared astronomy.
• The LDR is used in light failure alarm circuits and used in light meter.
• The LDR used in smoke detectors.
• It is used for automatic contrast and brightness control in television receivers.
• It is used in photosensitive relay
• It is used in optical coding.
• It is used in street light control circuits.
• It is used in camera light meters.
• It is used in the security alarm.
• It is used as a proximity switch.
• It is used in light activated control circuits.