Concept:
Ripple factor shows the amount of AC component present in the rectified output.
Step 1: A half-wave rectifier has ripple factor:
\[
1.21
\]
Step 2: A full-wave rectifier has lower ripple because both half cycles are used.
Step 3: Standard ripple factor of a full-wave rectifier is:
\[
0.482
\]
Therefore:
\[
\boxed{0.482}
\]