Force of Electromagnetic Radiation and Visible Light

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SUMMARY

The discussion centers on the force exerted by electromagnetic radiation, specifically light, with a focus on the equation F = dp/dt, which relates force to the change in momentum over time. It is established that photons carry momentum, allowing for calculations of force based on light's brightness and its interaction with surfaces. The concept of "light pressure" is introduced as a key factor, along with the ability of light to exert torque on birefringent materials through angular momentum.

PREREQUISITES
  • Understanding of momentum conservation principles
  • Familiarity with the equation F = dp/dt
  • Knowledge of light pressure and its implications
  • Basic concepts of birefringence and angular momentum
NEXT STEPS
  • Research "light pressure" and its applications in physics
  • Explore the effects of angular momentum in polarized light
  • Study the interaction of light with birefringent materials
  • Investigate practical applications of electromagnetic radiation in engineering
USEFUL FOR

Physicists, optical engineers, and anyone interested in the mechanics of light and its applications in technology and materials science.

pschwon731
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Is there an equation for force due to electromagnetic radiation?

For example, is there a force due to orange light?
 
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welcome to PF;
Is there an equation for force due to electromagnetic radiation?
yes: F=dp/dt

Photons carry momentum so you can use conservation of momentum and the brightness of the light to figure the force. Generally, light illuminates an area so you will be working out force per unit area.
- look up "light pressure"
 
Light can also carry angular momentum; additionally, linearly polarized light can exert a torque on a birefringent material.
 

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