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In Fig., there are two convex lenses L1 ...

In Fig., there are two convex lenses `L_1 and L_2` having focal lengths `F_1` and `F_2` respectively. The distance between `L_1` and `L_2` will be :
.

A

`F_1`

B

`F_2`

C

`F_1 + f_2`

D

`F_1 - F_2`

Text Solution

Verified by Experts

The correct Answer is:
C
`L_1` will converge the parallel ray at its focus , `L_2` will render it parallel only when the refracted ray starts from the focus of `L_2`.
`:.` Distance between `L_1 L_2 = F_1 + F_2`.
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Knowledge Check

  • In the figure given below there are two convex lenses L1 and L2 having focal lengths F1 and F2 respectively. The distance between L1 and L2 will be

    A
    `F_(1)`
    B
    `F_(2)`
    C
    `F_(1) + F_(2)`
    D
    `F_(1)-F_(2)`

  • In the figure shown, there are two convex lenses L_(1) and L_(2) having focal. Lengths f_(1) and f_(2) respectively. The distance between L_(1) and L_(2) will be

    A
    `f_(1)`
    B
    `f_(2)`
    C
    `f_(1)+f_(2)`
    D
    `f_(1)-f_(2)`

  • The shortest distances between L_(1) and L_(2) is

    A
    0
    B
    `17/sqrt3`
    C
    `41/3sqrt(3)`
    D
    `17/5sqrt(3)`

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