Question

Spacecraft propelled by laser radiation from Earth has been proposed recently. To test the concept a 10 kW laser with output circular beam of 2 meters in diameter is aimed at a spacecraft having a perfectly reflective mirror in a shape of a square with a side of 1 m oriented perpendicular to the beam. The spacecraft is at a distance of 300 km from the laser. Find: [a] (2pts) Calculate the maximum electric field $E_0$ in the laser beam? [b] (2pts) What is the intensity of the electromagnetic radiation hitting the sail? [c] (2 pts) What is the radiation pressure exerted by the laser beam on the sail? [d] (2pts) What is the radiation force exerted by the laser beam on the sail?

          Spacecraft propelled by laser radiation from Earth has been proposed recently. To test the concept a 10 kW laser with output circular beam of 2 meters in diameter is aimed at a spacecraft having a perfectly reflective mirror in a shape of a square with a side of 1 m oriented perpendicular to the beam. The spacecraft is at a distance of 300 km from the laser. Find:
[a] (2pts) Calculate the maximum electric field $E_0$ in the laser beam?
[b] (2pts) What is the intensity of the electromagnetic radiation hitting the sail?
[c] (2 pts) What is the radiation pressure exerted by the laser beam on the sail?
[d] (2pts) What is the radiation force exerted by the laser beam on the sail?

Spacecraft propelled by laser radiation from Earth has been proposed recently. To test the concept a 10 kW laser with output circular beam of 2 meters in diameter is aimed at a spacecraft having a perfectly reflective mirror in a shape of a square with a side of 1 m oriented perpendicular to the beam. The spacecraft is at a distance of 300 km from the laser. Find:
[a] (2pts) Calculate the maximum electric field E0 in the laser beam?
[b] (2pts) What is the intensity of the electromagnetic radiation hitting the sail?
[c] (2 pts) What is the radiation pressure exerted by the laser beam on the sail?
[d] (2pts) What is the radiation force exerted by the laser beam on the sail?

Added by Alison L.

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