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Convex lens: converging:: Concave lens:....

Convex lens: converging:: Concave lens:___.

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Complete the analogy: Concave Lens:Myopia: : Convex Lens:_______.

Convex lens of power +5 D and concave lens with power -3D are placed together, then the combined power is____.

A concave lens is a converging lens.

Give scientific reasons : A convex lens is known as a converging lens.

State whether the following statements are true or false : ( If a statement is false , correct it and rewrite it.) : A convex lens is converging lens.

Concave lens:Negative focal length:: Convex lens:____.

State whether the following statements are true or false : ( If a statement is false , correct it and rewrite it.) : A concave lens is converging lens.

Considering the correlation between the word of the first pair , pair of third word accordingly with proper answer OR write the correlated answer: Convex lens : Positive power of the lens :: Concave lens : ……………..

A beam of parallel rays is brought to focus by a planoconvex lens. A thin Concave lens of the same focal length is joined to the first lens. The effect of this is

A comvex lens and a concave lens are placed in contact. The ratio of magnitude of the power of the convex lens to that of the concave lens is 4:3. If the focal length of the convex lens is 12 cm, then the focal length of the combination will be

CHETANA PUBLICATION-LENSES-Exercise
  1. Find the odd word out :Presbyopia, night blindness, myopia, hypermetro...

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  2. Find odd word out: Spectacle, microscope, torch, camera

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  3. Convex lens: converging:: Concave lens:.

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  4. Object at 2F1: image at 2F2:: object at F1:.

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  5. Complete the analogy : Myopia: Concave lens:: Farsightedness:

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  6. Concave lens:Negative focal length:: Convex lens:.

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  7. Complete the analogy : Rod cells: Sensitive to dim light:: cone cells...

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  8. Complete the analogy : Near point : 25 cm:: Far point.

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  9. True/False: A lens is an opaque object.

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  10. True/False : Myopia can be corrected by using a spectacle of concave l...

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  11. True/False : Hypermetropia can be corrected by using a spectacle of co...

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  12. True/False : Cornea gives colour to the eye.

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  13. True/False : The light is first and maximum refracted as it passes thr...

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  14. True/False : The perception of colurs is concerned with cone cells.

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  15. True/False : Auditory nerve take the impulse from eye to brain

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  16. True/ False: Impression of an image lasts on the retina for frac(1)(10...

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  17. Concave lens:Negative focal length:: Convex lens:.

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  18. True / False: In the compound microscope, two concave lenses are used

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  19. If the object is at infinity from a convex lens, what would be its siz...

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  20. Write the lens formula.

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