Question:
Convex lens is used in:
Convex lens is used in:
Show Hint
Convex lens converges light; used for farsightedness correction.
Updated On: Oct 22, 2025
- short-sightedness
- long-sightedness
- presbyopia
- astigmatism
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Long-sightedness, or hypermetropia, occurs when the eye’s lens focuses light rays behind the retina because the eyeball is too short or the lens is too weak. This causes nearby objects to appear blurry.
Convex lenses (also called converging lenses) are used to correct hypermetropia. These lenses converge the incoming light rays before they enter the eye, effectively moving the focal point forward so that the light focuses precisely on the retina.
By adjusting the focal length and converging power of the corrective lens, the image is formed clearly on the retina, restoring normal vision for near objects.
Was this answer helpful?
0
0
Top Questions on Optics
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A) : Refractive index of glass is higher than that of air.
Reason (R) : Optical density of a medium is directly proportionate to its mass density which results in a proportionate refractive index.
In the light of the above statements, choose the most appropriate answer from the options given below : - In a Young's double slit experiment, two slits are located 1.5 m apart. The distance of screen from slits is 2 m and the wavelength of the source is 400 nm. If the 20 maxima of the double slit pattern are contained within the centre maximum of the single slit diffraction pattern, then the width of each slit is $ x \times 10^{-3} \, \text{cm} $, where x-value is:
- In a Young's double slit experiment, the source is white light. One of the slits is covered by red filter and another by green filter. In this case,
Light from a point source in air falls on a spherical glass surface (refractive index, \( \mu = 1.5 \) and radius of curvature \( R = 50 \) cm). The image is formed at a distance of 200 cm from the glass surface inside the glass. The magnitude of distance of the light source from the glass surface is 1cm.
- An equilateral prism is made of a material of refractive index \( \sqrt{2} \). Find the angle of incidence for minimum deviation of the light ray.
View More Questions
Questions Asked in Bihar Board XII exam
- Explain the characteristics of a good brand.
- Bihar Board XII - 2025
- Entrepreneurship: Concept, Functions and Need
- Explain the different kinds of capital.
- Bihar Board XII - 2025
- Business Strategy
- What are the responsibilities of an entrepreneur towards society? Explain.
- Bihar Board XII - 2025
- Entrepreneurship: Concept, Functions and Need
- Define planning and mention its features.
- State any two objectives of project report.
- Bihar Board XII - 2025
- Project Planning
View More Questions