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The refractive index of diamond is 2.42....

The refractive index of diamond is `2.42`. What is the meaning of this statement ?

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By saying that the refractive index of diamond is 2.42, we mean that the ratio of speed of light in air (or vacuum) to the speed of light in diamond is equal to 2.42.
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LAKHMIR SINGH & MANJIT KAUR-REFLECTION OF LIGHT -Exercise
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  3. The refractive index of diamond is 2.42. What is the meaning of this s...

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  4. Define one dioptre of power of a lens.

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  5. A convex lens forms a real and inverted image of a needle at a distanc...

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  6. Find the power of a concave lens of focal length 2 m.

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  7. Which one of the following materials cannot be used to make a lens ?

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  9. Where should an object be placed in front of a convex lens to get a re...

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  10. A spherical mirror and a thin spherical lens have each a focal length ...

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  11. No matter how far you stand from a spherical mirror, your image appear...

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  12. Which of the following lenses would you prefer to use while reading sm...

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  13. We wish to obtain an erect image of an object, using a concave mirror ...

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  15. One half of a convex lens is covered with a black paper. Will this len...

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  16. An object 5 cm in length is held 25 cm away from a converging lens of ...

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  17. A convcave lens of focal length 15 cm forms an image 10 cm from the le...

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  18. An object is placed at a distance of 10 cm from a convex mirror of foc...

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  19. The magnification produced by a plane mirror is m = +1. What does this...

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