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A pile 4m high driven into the bottom of...

A pile 4m high driven into the bottom of a lake is 1m above the `
`water . Determine the length of the shadow of the pile on the bottom of the lake if `
` the sun rays make an angle of `45^@` with the water surface . The refractive index`
` if water is `4/3`. `

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The correct Answer is:
2.88m
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PHYSICS GALAXY - ASHISH ARORA-GEOMETRICAL OPTICS-Unsolved Numerical Problems
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  2. Find the distance of an object from a convex lens if image is two ti...

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  3. A pile 4m high driven into the bottom of a lake is 1m above the wat...

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  4. An object is placed 12 cm to the left of a diverging lens of focal len...

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  5. A solid glass sphere with radius R and an index of refraction 1.5 is s...

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  6. A glass sphere with 10 cm radius has a 5 cm radius spherical hole at i...

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  7. A source of light is located at double focal length from a convergent ...

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  8. A parallel beam of rays is incident on a consisting pf three thin lens...

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  9. A ray of light is incident on the left vertical face of glass cube of ...

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  10. One face of a prism with a refrective angle of 30^@ is coated with sil...

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  11. In an isosceles prism of prism angle 45^(@), it is found that when the...

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  12. An astronomical telescope with objective of focal length 100 cm and ey...

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  13. Figure shows a right angled prism ABC having refractive mu(g)=(3)/(2) ...

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  14. An equilateral prism deviates a ray through 40° for two angles of inci...

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  15. A ray of light strikes a glass slab of thickness t. (i) Prove that i...

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  16. A plano-convex lens has thickness 4cm. When places on a horizontal tab...

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  17. An image Y is formed of a point object x by a lens whose optic axis is...

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  18. A thin plano-convex lens.of focal length f is split into two halves : ...

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  19. The focal lengths of the objective and the eye piece of a compound mic...

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  20. Find the minimum size of mirror required to see the full image of a wa...

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