  In this paper we combine WFC3/UVIS F275W, F336W, and F438W data from the "UV
Legacy Survey of Galactic Globular Clusters: Shedding Light on Their
Populations and Formation" (GO-13297) HST Treasury program with F606W, F625W,
F658N, and F814W ACS archive data for a multi-wavelength study of the globular
cluster NGC 6352. In the color-magnitude and two-color diagrams obtained with
appropriate combination of the photometry in the different bands we separate
two distinct stellar populations and trace them from the main sequence to the
subgiant, red giant, horizontal and asymptotic giant branches. We infer that
the two populations differ in He by Delta Y=0.029+/-0.006. With a new method,
we also estimate the age difference between the two sequences. Assuming no
difference in [Fe/H] and [alpha/Fe], and the uncertainties on Delta Y, we found
a difference in age between the two populations of 10+/-120 Myr. If we assume
[Fe/H] and [alpha/Fe] differences of 0.02 dex (well within the uncertainties of
spectroscopic measurements), the total uncertainty in the relative age rises to
~300 Myr.
