Question

Write short notes.(1) Photographs (2) Museums and History (3) Audio sources

Answer 1

photographs


A photograph or photo is an image created by light falling on a photosensitive surface, usually photographic film or an electronic image sensor, Most photographs are created using a camera, which uses a lens to focus the scene's visible wavelengths of light into a reproduction of what the human eye would see. The process and practice of creating such images is called photography. The word photograph was coined in 1839 by Sir John Herschel and is based on the Greek (phos), meaning "light", and (graphê), meaning "drawing, writing", together meaning "drawing with light"

museums and history


A museum (/mjuːˈziːəm/ mew-ZEE-əm; plural musea or museums) is an institution that cares for (conserves) a collection of artifacts and other objects of artistic, cultural, historical, or scientific importance. Many public museums make these items available for public viewing through exhibits that may be permanent or temporary.[1] The largest museums are located in major cities throughout the world, while thousands of local museums exist in smaller cities, towns and rural areas. Museums have varying aims, ranging from serving researchers and specialists to serving the general public. The goal of serving researchers is increasingly shifting to serving the general public


audio sources


Audio is sound within the acoustic range available to humans. An audio frequency (AF) is an electrical alternating current within the 20 to 20,000 hertz (cycles per second) range that can be used to produce acoustic sound. In computers, audio is the sound system that comes with or can be added to a computer. An audio card contains a special built-in processor and memory for processing audio files and sending them to speakersin the computer. An audio file is a record of captured sound that can be played back. Sound is a sequence of naturally analog signals that are converted to digital signals by the audio card, using a microchip called an analog-to-digital converter (ADC). When sound is played, the digital signals are sent to the speakers where they are converted back to analog signals that generate varied sound.

Answer 2

Photographs denotes about the ancient history, kings and their lifestyle.

A museum is an institution which has huge collections of artifacts & other objects of historical, cultural, artistic as well as scientific importance.

Most of the public museums will make these items found for public viewing through the exhibition which might be temporary or permanent.

There are some audio sources which helps you to know about the exiting collections of things.