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प्रश्न
Increase in the converging power of eye lens cause ‘hypermetropia'
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
Calculate the focal length of a corrective lens having power +2D.
Give the usual name for the following:
A point inside a lens through which the light passes undeviated.
Name the physical quantity whose unit is dioptre.
What is the unit of power of a lens? Define the unit of power of a lens.
The power of a lens is + 1.0 D is :
A screen is placed a distance 40 cm away from an illuminated object. A converging lens is placed between the source and the screen and its is attempted to form the image of the source on the screen. If no position could be found, the focal length of the lens
Find the power of a convex lens of focal length of + 25 cm.
According to Rayleigh’s scattering law, the amount of scattering of light is inversely proportional to the fourth power of its ______.
An object is kept at a distance of 1m from a lens of power +2D:
- Identify the type of lens.
- Calculate its focal length and distance of the image formed.
One dioptre is the power of a lens whose focal length is:
