Photography is the art, application, and practice of creating durable images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.
According to banglapedia 700 rivers flow in Bangladesh, but the information is old and obsolete. There is an including tributaries flow through the country constituting a waterway of total length around 24,140 kilometres (15,000 mi).
joined group 
