Conversion of Light to a Energy or Force

Click For Summary

Homework Help Overview

The discussion revolves around converting a light source, characterized by photon intensity, into energy or force. The original poster is exploring the relationship between light properties, specifically using Planck's equation and considering wavelength and stimulus intensity.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the need for wavelength information and how to calculate energy from photon intensity. Questions arise about the conversion process and the relevance of different units, such as candela.

Discussion Status

Some participants have provided guidance on calculating the energy of a photon and have prompted the original poster to clarify their specific concerns. There is an ongoing exploration of how to relate energy calculations to the intensity of light and the implications for force.

Contextual Notes

The original poster mentions a specific wavelength of 530 nm and a stimulus intensity of 10^10.4 photon/cm^2/sec, indicating constraints in the problem setup. There is uncertainty about the appropriate equations and methods to use for the calculations.

mariosphysics
Messages
3
Reaction score
0
I am looking to convert a light source (photons/cm^2/sec) to a energy or force. I have tried using Planck's but I'm not sure if this is in the right direction.

Any help greatly appreciated.
 
Physics news on Phys.org
welcome to pf!

hi mariosphysics! welcome to pf! :smile:

you'll need to know the wavelength :wink:
 
ok i have a wavelength at 530 nm. I am trying to calculate the energy or force for a light flash (100ms). And a stimulus intensity such as 10^10.4 photon/cm^2/sec.

Is this possible? I do not know where to start. I was trying to convert to candela. But I could not find any equations to use.
 
hi mariosphysics! :smile:

(just got up :zzz: …)

google "energy of a photon" for lots of cool sites

for example, http://www.pveducation.org/pvcdrom/properties-of-sunlight/energy-of-photon" :wink:
 
Last edited by a moderator:
Tiny-tim,

I understand how to calculate the energy of the light now. But how can I calculate it for the light flash or stimulus intensity such as 10^10.4 photon/cm^2/sec.

Or when I calculate energy of a photon (E) and then divide by the stimulus intensity to get: Joules/cm^2/sec. Does this make sense?

and then to get force I can multiply by the pathlength and time of light stimulus?

thanks for your help
 
hi mariosphysics! :smile:

sorry, i don't see what you're getting at :confused: …

can you give a specific problem as an example, and say what's worrying you about it?
 

Similar threads

Solving two body central force motion using Lagrangian
  • · Replies 11 ·
Replies
11
Views
3K
Why is the electric force the negative of the position derivative of EPE?
  • · Replies 5 ·
Replies
5
Views
3K
Canonical Partition function for 2 Fermions with two energy levels
  • · Replies 9 ·
Replies
9
Views
3K
Lagrange method problem: Multiple Spring-Mass System
  • · Replies 22 ·
Replies
22
Views
4K
Calculating exciton Green's function on a tight binding chain
  • · Replies 1 ·
Replies
1
Views
2K
Micro Spring (DNA): Determine Energies, Find Expected Length
  • · Replies 2 ·
Replies
2
Views
2K
Ultra high energy cosmic ray deflection angle causes by magnetic field
  • · Replies 1 ·
Replies
1
Views
2K
High School Using Interference Principles to Increase the Efficiency of Solar Panels
  • · Replies 0 ·
Replies
0
Views
1K
Undergrad Intuitive look at bending of light by gravity
  • · Replies 25 ·
Replies
25
Views
2K
Normalization of MCNP F4:P photon flux tally to experimental counts
  • · Replies 5 ·
Replies
5
Views
2K