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Sunrays pass through a pinhole in the ro...

Sunrays pass through a pinhole in the roof of a hut and produce an elliptical spot on the floor. The minor and major axes of the spot are 6 cm and 12 cm respectively. The angle subtended by the diameter of the sun at our eye is `0.5°`. Calculate the height of the roof.

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The correct Answer is:
`3.44 cm`
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ARIHANT-GEOMETRICAL OPTICS-Level 2
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  2. A car is travelling at night along a highway shaped like a parabola wi...

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  3. Consider the situation shown in the Figure. The mirror AB forms image ...

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  4. Two plane mirrors M1 and M2 of length d each are placed at right angle...

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  5. Three plane mirrors are kept as shown in the Figure A point object (O)...

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  6. Two plane mirrors are joined together as shown. Two point objects A an...

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  7. Two plane mirrors M1 and M2 are inclined at 30° to the vertical. A poi...

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  8. The distance between the eye and the feet of a boy is 1.5 m. He is sta...

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  9. OP is the principal axis of a concave mirror M1. Just below the axis a...

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  10. A real object AB has its image as IM when placed in front of a spheric...

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  11. Two spherical concave mirrors of equal focal length are put against ea...

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  12. A long rectangular strip is placed on the principal axis of a concave ...

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  13. A pencil (AB) of length 20 cm is moving along the principal axis of a ...

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  14. A small object of height h is placed perpendicular to the principal ax...

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  15. Consider a large parabolic mirror whose section can be represented by ...

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  16. Figure shows a glass (mu(g) = 1.5) vessel, partly filled with water (...

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  17. Two plane mirrors M1 and M2, placed at right angles, form two sides of...

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  18. When the sun appears to be just on horizon, it is in fact below the ho...

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  19. Intensity of a light beam can be defined as amount of light energy inc...

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  20. In the diagram shown, a light ray is incident on the lower medium boun...

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