  The electromagnetic form factors of $\pi$ and $K$ mesons and deuteron are
calculated in modified impulse approximation using instant form of relativistic
Hamiltonian dynamics. The different model wave functions are used. Meson wave
function parameters are fixed by fitting the mean square radius of meson. The
internal quark structure is taken into account through electromagnetic quark
form factor and quark anomalous magnetic moments. Results of our calculations
of electroweak structure of pion and kaon and electromagnetic deuteron
properties agree well with the available experimental data. The meson form
factors asymptotics at large momentum transfer is the same as in perturbative
QCD. Some predictions about CEBAF experiments are given.
