All about light and shadow
Black and white photography can seem dull next to the burst of colours emitted by colour photography, which creates a feeling of optimism and joy. Today, however, people are rediscovering the purity, beauty and power of black and white photography, which strips the image of the interpretive colours and has the ability to portray the timelessness, deep human emotions of pain, loss or despair.
Although the subject you are photographing is an important element of the picture, there are some other important factors to consider when shooting black and white photography. Basically, black and white photography is all about light and shadow. If you want to create stunning images, you need to learn to use these elements to compose your photos effectively and correctly. Experiment with the quality and intensity of light and try to take pictures of a subject at different times of the day and notice how light and shadow can affect the mood of the photo. For example, take a picture of a subject on a cloudy day, and then photograph the same subject on a bright day.
~The Art of Black and White Photography from fotoLARKO.com