- #1
zorro
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In the following figure, the space b/w the glass lenses is filled with water. We have to find the focal length of the system (radii of curvature, refractive indices given)
[URL]http://203.196.176.41/VLEBT_RootRepository/Resources/6c32207c-7c5a-4462-b90c-89b0c196bc72.gif[/URL]
Now to calculate the focal length of the system of lenses, we have to calculate the focal length of each lens. To find the same for water lens, we use lens maker's formula-
1/f = (μ-1)(1/R1 - 1/R2)
Why don't we substitute μ as gμw instead of aμw as given in all books? Doesn't the light travel from glass to water?
[URL]http://203.196.176.41/VLEBT_RootRepository/Resources/6c32207c-7c5a-4462-b90c-89b0c196bc72.gif[/URL]
Now to calculate the focal length of the system of lenses, we have to calculate the focal length of each lens. To find the same for water lens, we use lens maker's formula-
1/f = (μ-1)(1/R1 - 1/R2)
Why don't we substitute μ as gμw instead of aμw as given in all books? Doesn't the light travel from glass to water?
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