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Clear the meanings of optical density an...

Clear the meanings of optical density and mass density.

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Mass density is mass per unit volume. Optical density is the ratio of the speed of light in two media.
It is possible that mass density of an optically denser medium may be less than that of an optically rarer medium.
Mass density of turpentine is less than that of water but its optical density is higher.
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KUMAR PRAKASHAN-RAY OPTICS AND OPTICAL INSTRUMENTS-SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs ASKED IN COMPETITIVE EXAMS)
  1. Clear the meanings of optical density and mass density.

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  2. Which of the following is used in optical fibres ?

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  3. An astronomical telescope has a large aperture to ….. .

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  4. If two mirrors are kept at 60^@ to each other, then the number of imag...

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  5. As shown in figure, a plano-convex lens of focal length 20 cm is silve...

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  6. A light ray is incident perpendicular to one face of a 90^@ prism and ...

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  7. A plano- convex lens of refractive index 1.5 and radius of curvature 3...

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  8. The refractive index of transparent cylindrical rod is (2)/(root3) . A...

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  9. A fish looking up through the water sees the outside world, contained ...

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  10. Two point white dots are 1 mm apart on a black paper. They are viewed ...

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  11. A thin glass (refractive index 1.5) lens has optical power of - 5D in ...

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  12. The refractive index of glass is 1.520 for red light and 1.525 for blu...

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  13. Two lenses of power - 15D and + 5D are in contact with each other. The...

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  14. When monochromatic red light is used instead of blue light in a convex...

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  15. A beaker contains water up to a height h(1) and kerosene of height h(2...

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  16. Diameter of a plano-convex lens is 6 cm and thickness at the centre is...

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  17. A green light is incident from the water to the air-water interface at...

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  18. Monochromatic light is incident on a glass prism of angle A. If the re...

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  19. On a hot summer night, the refractive index of air is smallest near th...

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  20. An observer looks at a distant tree of height 10 m with a telescope of...

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  21. A diverging lens with magnitude of focal length 25 cm is placed at a d...

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