Description

The image is a graphic representation of the energy efficiency of a laser sail. The graph shows the energy efficiency of the laser sail as a function of the laser power. The energy efficiency is shown as a percentage, with the x-axis representing the laser power and the y-axis representing the energy efficiency. The graph is labeled with various terms, such as "laser sail," "energy efficiency," and "laser power." The graph is accompanied by a description of the laser sail, which is a type of sail that uses laser energy to propel a boat.