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![[Post New]](/templates/default/images/icon_minipost_new.gif) 3 Sep 2007 19:44:40 IST
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can the equation F=R/2 suitable for lens
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3 Sep 2007 20:42:21 IST
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YES it is applicable for lens also.
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3 Sep 2007 21:06:57 IST
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No ...this formula is certainly not applicable ......here the RI of the lens plays a role ..so it lens makers formula that has to be used...
do rate me ....
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3 Sep 2007 22:18:29 IST
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no never do that!!!
that was only till 10th
use the lens eqn
though it gives right answer sometimes
but preferably avoid
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20 Sep 2007 00:31:41 IST
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no, it is strictly not
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20 Sep 2007 00:46:11 IST
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Unlike junior classes now we dont only deal thin lenses(for which the formula is right), but very often we come across thick lenses also and for that the R for the two part is not equal (HENCE, f is not equla to R/2 Rate if satisfied
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20 Sep 2007 11:30:43 IST
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No we cant use that for lenses. The reason for that is the concept of virtual object. Here the light undergoes refraction twice. The extent to ehich it deviates thus depends on the medium of glass. So we cant use it. In previous classes, we considered light to refract only once. So used that formula. Hp u r clr.....
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