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A student obtains a blurred image of a d...

A student obtains a blurred image of a distant object on a screen using a convex lens. To obtain a distinct image on the screen he should move the lens

A

towards the screen

B

away from the screen

C

either towards or away from the screen

D

very far away from the screen

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The correct Answer is:
C
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Name the lens used to obtain the image on a screen.

Try this Material: Convex lens, screen, metre scale, stand for the lens etc. Method: Keeping the screen fixed, obtain a clear image of a distant object like a tree or a building with the help of the lens on the screen. Measure the distance between the screen and the lens with the help of the metre scale. Now tum the other side of the lens towards the screen. Again obtain a clear image of the distant object on the screen by moving the lens forward or backward. Measure the distance between the screen and the lens again. What will happen if you use a concave lens in this experiment?

Try this Material: Convex lens, screen, metre scale, stand for the lens etc. Method: Keeping the screen fixed, obtain a clear image of a distant object like a tree or a building with the help of the lens on the screen. Measure the distance between the screen and the lens with the help of the metre scale. Now tum the other side of the lens towards the screen. Again obtain a clear image of the distant object on the screen by moving the lens forward or backward. Measure the distance between the screen and the lens again. What ls this distance between the lens and the screen called?

Try this Material: Convex lens, screen, metre scale, stand for the lens etc. Method: Keeping the screen fixed, obtain a clear image of a distant object like a tree or a building with the help of the lens on the screen. Measure the distance between the screen and the lens with the help of the metre scale. Now tum the other side of the lens towards the screen. Again obtain a clear image of the distant object on the screen by moving the lens forward or backward. Measure the distance between the screen and the lens again. Discuss the relation between this distance and the radius of curvature of the lens with your teacher.

LAKHMIR SINGH & MANJIT KAUR-THE HUMAN EYE AND THE COLOURFUL WORLD -Multiple Choice Questions
  1. The focal length of the concave mirror in the experimental set up, sho...

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  2. While determining the focal length of a concave mirror, a student obta...

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  3. A student obtains a blurred image of a distant object on a screen usin...

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  4. Four students A, B, C and D performed the experiment to determine the ...

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  5. A student has to do the experiment on finding the focal length of a gi...

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  6. Four student A,B,C and D performed an experiment to detemine the focal...

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  7. The parallel rays form the top of a distant tree are incident on a con...

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  8. In order to determine the focal length of a concave mirror, a student ...

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  9. In order to determine the focal length of a concave mirror, a student ...

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  10. A student performs an experiment on finding the focal length of a conv...

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  11. A student obtained a sharp image of the grill of a window in the labor...

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  12. A sharp image of a distant object is obtained on a screen by using a c...

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  13. While performing the experiment to detemine the focal length of a con...

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  14. While performing an experiment on determining the focal length of a co...

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  15. While performing the experiment on the determination of focal length o...

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  16. A student was given the following suggestions by his classmates for pe...

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  17. For performing an experiment, a student was asked to choose one concav...

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  18. A teacher gives a convex lens and a concave mirror of focal length of ...

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  19. Three students measured the focal length of a convex lens using parall...

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  20. A student has to do the experiment on finding the focal length of a gi...

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