Photographs of fire and flames, like photographs in low-light situations, are difficult to capture. This is down to many factors such as the continuously changing nature of the flame, and the immense heat and light given off by it. The heat makes it difficult to get close, so a long distance lens must be used. Of course that is not ideal, but it is necessary. The bright light makes it difficult to capture images in which the background is also clearly visible. The flickering and changing nature of the flame make it difficult to find a spot to focus on.
In this photograph, using a relatively slow shutter speed, the flames have a blurred, softer appearance. There is a plate at the back because this photograph was taken during a havan, a Hindu tradition in which various things are put into a fire.