Photography is the art, application and practice of creating durable images by recording light or other electromagnetic radiation , either electronically by means of an image sensor , or chemically by means of a light-sensitive material such as photographic film. It is employed in many fields of science, manufacturing e. Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. With an electronic image sensor, this produces an electrical charge at each pixel , which is electronically processed and stored in a digital image file for subsequent display or processing.
Protesters pull down statue of slave trader and push it into harbour. In Pictures: Black Lives Matter protesters take to streets. Social media star Amena Khan removes headscarf. Places of worship set to reopen for private prayer from June Anti-racism campaigners rename Glasgow streets linked to slave owners. Taxi driver's escape from 4am knifepoint terror during pick-up 2.
A pregnant teacher and cheerleading coach had sex with a year-old student in the Dallas-Fort Worth area, Texas, it has been reported. An arrest warrant was acquired after it was claimed that Katherine Ruth Harper sent nude photos and had sex with the student over the summer holiday. The year-old met the teenager at Tidwell Middle School in Roanoke, where she worked as a cheerleading coach, tennis coach and 7th-grade teacher.
The surroundings of the projected image have to be relatively dark for the image to be clear, so many historical camera obscura experiments were performed in dark rooms. The term "camera obscura" also refers to constructions or devices that make use of the principle within a box, tent, or room. Camera obscuras with a lens in the opening have been used since the second half of the 16th century and became popular as an aid for drawing and painting. The camera obscura box was developed further into the photographic camera in the first half of the 19th century when camera obscura boxes were used to expose light-sensitive materials to the projected image.