Radiation Pressure of 75 Watt Bulb at 8 cm

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SUMMARY

The discussion focuses on estimating the radiation pressure produced by a 75 Watt bulb at a distance of 8 cm. The relevant equations include the Poynting vector formula S=(E x B) and the pressure formula P = S/c. Participants emphasize the need to understand the relationship between photon momentum, energy, and wavelength to calculate the electric field (E) generated by the bulb.

PREREQUISITES
  • Understanding of electromagnetic wave theory
  • Familiarity with the Poynting vector
  • Knowledge of photon energy and momentum relationships
  • Basic principles of radiation pressure
NEXT STEPS
  • Study the derivation of the Poynting vector and its applications
  • Learn about the relationship between photon energy, wavelength, and momentum
  • Explore calculations of radiation pressure from various light sources
  • Investigate the effects of distance on radiation pressure
USEFUL FOR

Students in physics, educators teaching electromagnetic theory, and anyone interested in the practical applications of radiation pressure in optics and photonics.

FrankJ777
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b]1. Homework Statement [/b]
Estimate the radiation pressure due to a 75 Watt bulb at a distance of 8 cm from the center of the bulb.

Homework Equations


S=(E x B) , P = S/c



The Attempt at a Solution


I'm not sure were to start. How can I determine the value of E from a 75 Watt bulb.
 
Physics news on Phys.org
You need to know how the momentum and energy of a photon are related to its wavelength.
 

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