In timing devices for x-ray equipment, exposure times can be shortened to the order of one millisecond, which equals 1/1000 second.

In timing devices for x-ray equipment, exposure times can be shortened to the order of one millisecond, which equals 1/1000 second.

• A. 1/10 second
• B. 1/100 second
• C. 1/1000 second
• D. 1/10000 second

Answer: (C)

One millisecond is one thousandth of a second. In timing devices for x-ray equipment, exposures are extremely brief, so using milliseconds makes the timing easier to read. Since 1 millisecond equals 0.001 seconds (that is, 1/1000 of a second), the statement about shortening exposure times to one millisecond corresponds to 1/1000 second. The other fractions represent longer or shorter intervals (0.1 s, 0.01 s, and 0.0001 s), so they do not match 1 millisecond.

One millisecond is one thousandth of a second. In timing devices for x-ray equipment, exposures are extremely brief, so using milliseconds makes the timing easier to read. Since 1 millisecond equals 0.001 seconds (that is, 1/1000 of a second), the statement about shortening exposure times to one millisecond corresponds to 1/1000 second. The other fractions represent longer or shorter intervals (0.1 s, 0.01 s, and 0.0001 s), so they do not match 1 millisecond.