A microscopic spherical dust particle of radius 2.000 μm and mass 10.0 µg is moves in outer space at a constant speed of 30.0 cm/s. A wave of light strikes the particle from the opposite direction to the direction of the particle’s motion and this light is absorbed. The particle decelerates uniformly to rest in a time of 1.00 s. What was the average electric field amplitude of the absorbed light?
Electromagnetic radiation from a 5.00-mW laser is concentrated into a 1.00-mm2-area beam.
What is the radiation intensity of the beam?
What is the maximum electric force that the beam can exert on a 2.00-nC electric charge?
What is the maximum magnetic force that the beam can exert on a 2.00-nC charge that has a speed of 400 m/s?
Sunlight falls perpendicularly on a kite with a reflecting surface of area 0.75 m2. The average intensity of the sunlight is 900 W/m2.
What is the average force on the kite due to radiation pressure?
If the kite material is black and absorbs all sunlight, what is the average force on the kite due to radiation pressure?