Four modifications are suggested in the lens formula to include the ef

1.	Four modifications are suggested in the lens formula to include the effect of the thickness t of the lens. Which one is likely to be correct ?(a)1/v-1/u=t/uf(b) t/v2-1/u=1/f(c) 1/(v-t)- 1/(u+t) =1/f(d) 1/v-1/v+ t/uv= t/f.
Answer» (c) 1/(v-t)- 1/(u+t) =1/f EXPLANATION: The thickness of the lens will affect the object distance or image distance. Either the thickness t will be added or subtracted to u or v. It will not be in a proportion as shown in the options (a), (b) and (d). Hence the option (c) is correct.

Four modifications are suggested in the lens formula to include the effect of the thickness t of the lens. Which one is likely to be correct ?(a)1/v-1/u=t/uf(b) t/v2-1/u=1/f(c) 1/(v-t)- 1/(u+t) =1/f(d) 1/v-1/v+ t/uv= t/f.

Answer»

(c) 1/(v-t)- 1/(u+t) =1/f

EXPLANATION:

The thickness of the lens will affect the object distance or image distance. Either the thickness t will be added or subtracted to u or v. It will not be in a proportion as shown in the options (a), (b) and (d). Hence the option (c) is correct.

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Four modifications are suggested in the lens formula to include the effect of the thickness t of the lens. Which one is likely to be correct ?(a)1/v-1/u=t/uf(b) t/v2-1/u=1/f(c) 1/(v-t)- 1/(u+t) =1/f(d) 1/v-1/v+ t/uv= t/f.

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