Raster images are made of pixels. A pixel is a single point or the smallest single element in a display device. If you zoom in to a raster image you may start to see a lot of little tiny squares. Vector images are mathematical calculations from one point to another that form lines and shapes.
Also, what is the difference between raster and vector?
Answer: The difference between vector and raster graphics is that raster graphics are composed of pixels, while vector graphics are composed of paths. A raster graphic, such as a gif or jpeg, is an array of pixels of various colors, which together form an image.
Are PDF files raster or vector?
It's easy to tell whether your PDF file is a raster or vector format by viewing it in Adobe Acrobat. This is important since the two file types are converted differently. Vector PDF files are best transformed through data extraction. Raster PDF files are traced since there is no data to extract.
Is Photoshop a raster or vector program?
The most common vector file types are AI, CDR, and SVG. Common vector creation and editing programs include Adobe Illustrator, CorelDraw, and InkScape. The most popular raster editors are Photoshop (which has limited vector capabilities) and GIMP.