light Archive

Properties of laser light

Coherence Laser light is highly coherent. All emitted photons have constant phase relationship i.e they are in same phase. The light from a laser is said to be coherent, which means the wavelengths of the laser light are in

Difference between mesh storage CRT and phosphor storage CRT

Following are main difference between mesh storage CRT(Cathode ray tube) and phosphor storage CRT(Cathode ray tube) Mesh storage CRT Phosphor storage CRT The Mesh storage is appropriate for intensity modulation and variable persistence operation. The phosphor storage

What is fiber optic communication ?

The fiber optic technology has been developed mostly for use in communication. fiber-optic communication is transmitting information from one place to another by sending pulses of light through an optical fiber. a technology that uses glass or threads to transmit data. a

Applications of infra-red light emitting diode (IR LED)

The important applications of infra-red light emitting diode (IR LED) are as given below, The IR LED is used as a light source in optical systems. The IR LED is used in burglar alarm systems. It is

Application of light dependent resistor (LDR)

The Light Dependent Resistor (LDR) used for automatic contrast and brightness control in television receivers. The LDR is used in the infrared astronomy. The LDR is used in optical coding. Used in light activated control circuits. Used

Application of LED

Some of the important applications of LED  are given below: It is used in optical switching application. It is used in burglar alarm system. It is used for indicating power ON/OFF conditions, power level indicators or stereo

Advantage & disadvantage of LED

The advantages of LED are some of given below: It has long life compared to lamps. It has low voltage operation, making them compatible with integrated circuits. LED are ideal for operation under cold and low outdoor

Laser light and ordinary light difference

Laser light Ordinary light It is highly coherent. It is incoherent in nature. There coherence length as of the order of few km (Kilometer). There coherence length as of the order of few mm (Millimeter). It is