A point source of light is placed at distance of 2f from the converging lens of focal length f.the intensity on the other side of the lens is maximum at a distance 1.f 2.2f?

Asked by ESHA ESHA | 1st Sep, 2012, 12:54: AM

Expert Answer:

using the equatin for for lens:
 
object distance, u = -2f
focal length, F = +f
let the image distance be v
the equation is:
 
1/v - 1/u = 1/f
1/v = 1/(2f)
thus the image will form at 2f and thus the intensity will be maximum at 2f

Answered by  | 4th Sep, 2012, 05:23: PM

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