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NCERT-LIGHT - REFLECTION AND REFRACTION-Exercise
- Define one dioptre of power of a lens.
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- A convex lens forms a real and inverted image of a needle at a distanc...
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- Find the power of a concave lens of focal length 2 m.
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- Which one of the following materials cannot be used to make a lens ?
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- The image formed by a concave mirror is observed to be virtual, erect ...
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- Where should an object be placed in front of a convex lens to get a re...
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- A spherical mirror and a thin spherical lens each have a focal length ...
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- No matter how far you stand from a spherical mirror, your image appear...
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- Which of the following lenses would you prefer to use while reading sm...
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- We wish to obtain an erect image of an object, using a concave mirror ...
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- Name the type of mirror used in the following situations : (a) Head ...
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- One half of a convex lens is covered with a black paper. Will this len...
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- An object 5 cm in length is held 25 cm away from a converging lens of ...
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- A concave lens has focal length of 15 cm. At what distance should an o...
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- An object is placed at a distance of 10 cm from a convex mirror of foc...
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- The magnification produced by a plane mirror is m = +1. What does this...
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- An object 5.0 cm in length is placed at a distance of 20 cm in front o...
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- An object of size 7.0 cm is placed at 27 cm in front of a concave mirr...
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- Find the focal length of a lens of power - 2.0 D. What type of lens is...
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- A doctor has prescribed lens of power + 1.5 D. Find the focal length o...
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