Need Photoshop help! High Dynamicy Range?

I'm very confused about a photo assignment. Here are the instructions that I don't understand:

1) Shoot 5 bracketed images in your camera's RAW (16 bit) file format.

2) Open bridge and select images to use. Tools/Photoshop/Merge to HDR (High Dynamicy Range).

3) Single HDR image will open in Photoshop (looks like any other image but is in 32 bits and has wider density range). Save image right away in PBM (portable bitmapped) format.

4) Convert image to 16-bit mode so you can have the full range of adjustments available.

That's just the first half. I have no idea what that means. Can anyone interpret it?? I feel dumb.

Need Photoshop help! High Dynamicy Range?husqvarna

The dynamic range of a photograph tells you the difference between the brightest white and the darkest black that could be represented by the file format and camera sensor. Digital camera sensors have a dynamic range that is inferior to human vision. To make up for this, a technique has been invented called high dynamic range. To do this, the same picture is taken several times, but at slightly different exposure settings (different times). The shorter exposures get the details in the bright areas. The longer exposures get the details in the dark areas. The "correct" exposure gets the details in most of the image. A computer program is used to put these low dynamic ranges images together into one, bit image with a higher dynamic range. More images at more settings allow an even higher dynamic range. Now, I'll answer your question: