Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
Photography is a 2-Dimensional recording process.Holography is a 3-Dimensional recording process.
Definition, Types, Construction, Reconstruction, Working Principle, Precautions, Applications
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
The word "Holography" is derived from a greek word. In greek 'Holos' means 'whole' and 'graphein' means 'to write', in other way we can say 'graphy' means 'recording'.
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
Magnetic storage devices are made by flexible material coated with magnetic oxides.
Construction, Working Principle, Design, Storage capacity, Operation, Applications
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
CD/DVD comes under the category of a permanent storage device, used in computers.
List of various techniques
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
Optical data storage is the storage of data in an optical medium using Laser light. Here data is recorded and read by focussing the laser on a spinning optical disk.
Characteristics, Types, Construction, Working Principle, Advantages, Disadvantage
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
Laser diode is of two categories viz. Homojunction semiconductor, diodeHeterojunction semiconductor diode.
Working Principle, Fabrication, Construction, Operation, Advantages, Disadvantage, Applications
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
Organic Light Emitting Diode, shortly called as OLED is new type of electronic device which emits light, consuming very less energy.
Construction, Working Principle
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
In the planer LED, the reflection loss is more because most of the emitted light strikes the material interface at an angle greater than the critical angle.
Definition, Types, Construction, Working Principle, Advantages, Disadvantage
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
LED is a semiconductor p-n junction diode which converts electrical energy to light energy under forward biasing. It emits light in both visible and IR region.
Working Principle, Fabrication, Construction, Operation, Advantages, Disadvantage, Applications
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
A solar cell is a basically a large area photo-diode which converts sunlight [solar energy] directly into electricity [Electrical energy], with larger efficiency, of photon absorption.
Fabrication, Operation, Construction, Working Principle, Types, Advantages, Disadvantage, Applications
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
When a p-n junction diode is exposed to light (photons), under reverse bias, it produces electron and hole pairs. Due to the flow of these charge carriers, it produces a reverse current.
Optical Properties of Materials
Subject and UNIT: Physics for Information Science: Unit IV: Optical Properties of Materials
In metals, there are large number of free electrons. These free electrons can more freely to a highest energy level, so called Fermi energy level EF.