Consider three converging lenses L1- L2 and L3 having identical geometrical construction- The refractive index of L1 and L2 are -1 and -2 respectively- The upper half of the lens L3 has a refractive index -1 and the lower half has -2- A point O is imaged at O 1 by the lens L 1 and at O 2 by the lens L 2 placed in same position- If L3 is placed at same place-A- There will be an image at O 1B- There will be an image at O 2C- The only image will form somewhere between O 1 O 2D- The only image will form away from O 2

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Standard X

Physics

Image Formation by Spherical Lenses

Consider thre...

Question

Consider three converging lenses $L_{1}$ , $L_{2}$ and $L_{3}$ having identical geometrical construction. The refractive index of $L_{1}$ and $L_{2}$ are $μ_{1}$ and $μ_{2}$ respectively. The upper half of the lens $L_{3}$ has a refractive index $μ_{1}$ and the lower half has $μ_{2}$ . A point O is imaged at $O_{1}$ by the lens $L_{1}$ and at $O_{2}$ by the lens $L_{2}$ placed in same position. If $L_{3}$ is placed at same place,

There will be an image at

O_{1}

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There will be an image at

O_{2}

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The only image will form somewhere between

O_{1} O_{2}

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The only image will form away from

O_{2}

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Solution

The correct options are
A There will be an image at $O_{1}$
B There will be an image at $O_{2}$
Focal length of the upper part and lower part does not change

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The correct options are A There will be an image at O1 B There will be an image at O2Focal length of the upper part and lower part does not change

The correct options are
A There will be an image at $O_{1}$
B There will be an image at $O_{2}$
Focal length of the upper part and lower part does not change