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A bi-convex lens is formed with two thin...

A bi-convex lens is formed with two thin plano-convex lenses as shown in the figure. Refractive index n of the first lens is 1.5 and that of the second lens is 1.2. Both the curved surface are of the same radius of curvature R=14 cm. For this bi-convex lens, for an object distance of 40 cm, the image distance will be `

A

` –280.0 cm`

B

40.0 cm

C

21.5 cm

D

13.3 cm

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The correct Answer is:
B
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MOTION-GEOMETRICAL OPTICS-Exercise - 4 | Level-II
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  4. Most materials have the refractive index, n gt 1. So, when a light ray...

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  9. A point source S is placed at the bottom of a tranparent block of heig...

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  11. A transparent thin film of uniform thickness and refractive index n(1)...

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  12. Consider a concave mirror and a convex lens (refractive index 1.5) of ...

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  14. A monochromatic beam of light is incident at 60^@ on one face of an eq...

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  15. Light guidance in an optical fibre can be understood by considering a ...

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  16. Light guidance in an optical fibre can be understood by considering a ...

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  17. A parallel beam of light is incident from air at an angle alpha on the...

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  18. A plano-covex lens is made of a material of refractive index n. When a...

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  19. A transparent slab of thickness d has a refractive index n(z) that inc...

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  20. A small object is placed 50 cm to the left of a thin convex lens of fo...

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