The original poster presents a problem involving a 60 W monochromatic point source radiating in a vacuum and seeks to determine the electric field amplitude at a distance of 2m from the source. The context involves concepts from electromagnetism and wave physics.
The discussion includes attempts to clarify the relationship between intensity and electric field amplitude, with some guidance offered on relevant equations. However, there is no explicit consensus on the next steps for the original poster's problem. The separate question about the LDR circuit has prompted a reminder about thread etiquette, indicating a need for clearer organization in the discussion.
The original poster's problem involves assumptions about the uniformity of radiation and the properties of the medium (vacuum). The second question introduces a different context that may not directly relate to the first, highlighting potential confusion in the discussion.
hopeless blonde said:Desperate semi related question. If you have a graph of log intensity against log of (voltage across an LDR in a potential divider circuit)
how do you explain the relationship if your resultant is a straight line of -1.7 obviously in the form of y=mx+c
Log(y)= nlog(x) + logm where y is intensity and x is voltage n being -1.7 and logm being y intercept.
im trying to explain the relationship between the two quantities and ... I am stuck if anyone can help me i would very much appreciate it...