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A ray of light travelling in air enters ...

A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal ? Why ?

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When a ray of light travelling in air enters obliquely into water, it bends towards the normal. This is because water is optically denser (than air) due to which the speed of light waves decreases on entering water, making the light bend towards the normal.
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LAKHMIR SINGH & MANJIT KAUR-REFLECTION OF LIGHT -Exercise
  1. Find the focal length of a concave mirror whose radius of carvature is...

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  2. A concave mirror produces three times magnified real image of an objec...

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  3. A ray of light travelling in air enters obliquely into water. Does the...

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  4. Light enters from air into a glass plate having refractive index 1.50....

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  5. Find out from Table on page 225 the medium having highest optical dens...

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  6. You are given kerosene, turpentine and water. In which of these does t...

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  7. The refractive index of diamond is 2.42. What is the meaning of this s...

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  8. Define one dioptre of power of a lens.

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

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

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

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  12. The image formed by a concave mirror is observed to be virtual, erect ...

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

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

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

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

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

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  18. Name the type of mirror used in the following situations : (a) Head ...

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

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

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