The momentum p associated with a photon can be calculated using the equation:$p = \frac{E}{c}$where E is the energy of the photon and c is the speed of light in a vacuum.Given that the energy E of the photon is 1.5 eV, and the speed of light c is approximately $3 \times 10^8$ meters per second, we can calculate the momentum p:$p = \frac{1.5\ \mathrm{eV}}{c}$$p \approx \frac{ \frac{1.5 \times 1.6 \times 10^{-19}}{\mathrm{J}} }{3 \times 10^8\ \mathrm{m/s}}$$p \approx \frac{ \frac{2.4 \times 10^{-19}}{\mathrm{J}} }{3 \times 10^8\ \mathrm{m/s}}$$p \approx 8 \times 10^{-28}\ \mathrm{kg\ m/s}$