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प्रश्न
Assertion and reasoning type
- Assertion: Myopia is due to the increase in the converging power of eye lens.
- Reason: Myopia can be corrected with the help of concave lens.
पर्याय
If both assertion and reason are true and the reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false.
Assertion is false but reason is true.
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उत्तर
If both assertion and reason are true but reason is not the correct explanation of assertion.
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संबंधित प्रश्न
State the power of a lens S.I. unit.
Give the usual name for the following:
A point inside a lens through which the light passes undeviated.
Which one of the following materials cannot be used to make a lens?
An object of height 4 cm is placed at a distance of 15 cm in front of a concave lens of power, −10 dioptres. Find the size of the image.
A convex lens of power 5 D and a concave lens of power 7.5 D are placed in contact with each other. What is the :
(a) power of this combination of lenses?
(b) focal length of this combination of lenses?
The power of a combination of two lenses X and Y is 5 D. If the focal length of lens X be 15 cm :
(a) calculate the focal length of lens Y.
(b) state the nature of lens Y.
How is accommodation produced?
The power of a lens is +2.0 D. Find its focal length and state the kind of lens.
The power of lens depends on the focal length of the lens
A point object is placed at O in front of a glass sphere as shown in figure.
Show the formation of the image by the sphere.
