Which file extension is typically used for photographic images?

The .jpeg file extension is typically used for photographic images due to its ability to effectively compress large files while maintaining a reasonable level of quality. JPEG stands for Joint Photographic Experts Group, which is the name of the committee that created this format. It is particularly well-suited for photographs, as it supports millions of colors and allows for gradual degradation in quality when compressed, making it ideal for web usage where load times are a concern.

In addition to this, JPEG files are widely supported across digital cameras, smartphones, and various software applications, making them a popular choice for both casual users and professionals. This format is advantageous in contexts where storage space is limited or where images must be shared online.

Other file types mentioned, such as .pdf (often used for documents), .gif (better for simple animations or images with fewer colors), and .doc (used for Microsoft Word documents), are not primarily designed for photographic images, which further distinguishes .jpeg as the correct choice.