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A glass cube of edge 1 cm and mu=1.5 has...

A glass cube of edge 1 cm and `mu=1.5` has a spot at the centre. The area of the cube face that must be covered to prevent the spot from being seen is (in `cm^(2)`)

A

`sqrt(5)pi`

B

`5pi`

C

`(pi)/(sqrt(5))`

D

`(pi)/5`

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-GEOMETRICAL OPTICS-LECTURE SHEET (EXERCISE II LEVEL -II (ADVANCED) STRAIGHT OBJECTIVE TYPE QUESTIONS)
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  5. The image of point P when viewed from top of the slabs will be

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  6. The angle of minimum deviation for a 75^(@) prism of dense glass is fo...

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  7. A certain prism of refracting angle 60^(@) and of refractive index 2 i...

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  8. A ray of monochormatic light is incident on one refracting face of a p...

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  9. The light ray is incident at an angle of 60^(@) on a prism of angle 45...

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  10. A prism of glass (mu=1.5) is dipped in to water as shown in the figure...

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  12. The principal section of a glass prism is an isosceles triangle ABC wi...

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  13. Two prisms A and B are in contact with each other have angular dispers...

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  14. Two prisms A and B have dispersive powers of 0.012 and 0.018 respectiv...

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  15. In the figure shown (sini)/(sinr) is equal to

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  16. A convergent beam is incident on two slabs placed in contact as shown ...

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  17. A parallel sided block of glass of refractive index 1.5 which is 36 m...

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  18. An insect starts moving up in a liquid from point O of variable refrac...

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