A photograph or photo is an image created by light falling on a light-sensitive surface, usually photographic film or an electronic medium such as a CCD or a CMOS chip. 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 photographs is called photography. The word "photograph" was coined in 1839 by Sir John Herschel and is based on the Greek φῶς ("phos"), meaning "light", and γραφή ("graphê"), meaning "drawing, writing", together meaning "drawing with light". 

The first permanent photograph, a contact-exposed copy of an engraving, was made in 1822 using the bitumen-based "heliography" process developed by Nicéphore Niépce. The first photographs of a real-world scene, made using a camera obscura, followed a few years later, but Niépce's process was not sensitive enough to be practical for that application: a camera exposure lasting for hours or days was required. In 1829 Niépce entered into a partnership with Louis Daguerre and the two collaborated to work out a similar but more sensitive and otherwise improved process. 

After Niépce's death in 1833, Daguerre concentrated on silver halide-based alternatives. He exposed a silver-plated copper sheet to iodine vapor, creating a layer of light-sensitive silver iodide; exposed it in the camera for a few minutes; developed the resulting invisible latent image to visibility with mercury fumes; then bathed the plate in a hot salt solution to remove the remaining silver iodide, making the results light-fast. He named this first practical process for making photographs with a camera the daguerreotype, after himself. Its existence was announced to the world on 7 January 1839 but working details were not made public until 19 August. Other inventors soon made improvements which reduced the required exposure time from a few minutes to a few seconds, making portrait photography truly practical and widely popular. QUESTIONS:

Q1:
1. What is the definition of a photograph?
2. How can a photo be defined?
3. 
Q2:
1. How are photographs created?
2. What is the process for photogrpah making?
3. 
Q3:
1. When did the word photograph come about?
2. What was the year when the word photograph was first uttered?
3. 
Q4:
1. What creation came about in 1822?
2. What did 1822 see the creation of?
3. 
Q5:
1. What took place in 1829?
2. What was an event that happened in 1829?
3. 
Q6:
1. Whose death took place in 1833?
2. Who passed away in 1833?
3. 
Q7:
1. What is the mechanism for making a light sensitive silver iodide?
2. What must be done to bring into existence a light sensitive silver iodide?
3. 
Q8:
1. Is photography easy to do and something people enjoy?
2. Do a lot of people like taking photographs and is it user friendly?
3. 
Q9:
1. What is needed to take most photographs?
2. How do people generally take photos?
3. 
Q10:
1. What was the name of a person who died in 1833?
2. Whose life was cut short in 1833?
3. 
