Lesson: Radiation PressurePhysics
In this lesson, we will learn how to calculate the pressure due to incident radiation of a given intensity that is experienced by an object.
Sample Question Videos
A 150 W light bulb emits of its energy as electromagnetic radiation. The bulb is at the center of a perfectly light-absorbing sphere of radius 10.00 m. What is the radiation pressure on the sphere’s interior?
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?
A microscopic spherical dust particle of radius 2.000 μm and mass 10.0 µg is moving 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?