Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NDA 2024
Exam
NDA
Year
2024
Subject
General Ability
Chapter
General Science

NDA 2024 · General Ability · General Science

The human eye is like a camera that has a lens with:

The human eye is like a camera that has a lens with:

Options

  1. Afixed focal length and fixed asperture size.
  2. Bvariable focal length and fixed aperture size.
  3. Cfixed focal length and variable aperture size.
  4. Dvariable focal length and variable aperture size.

Correct answer

D. variable focal length and variable aperture size.

Step-by-step solution

Variable focal length and variable aperture size: This option means that both the focal length and the aperture size can change. The human eye indeed has a variable focal length (accommodation allows it to focus on objects at varying distances) and a variable aperture size (pupil dilation adjusts based on light conditions).
Practice General Science on Quantrex Academy →

More from General Science

For an object in gravitational field, the gravitational potential is the same at two… NDA 2026A very large container consists of an ideal gas. The speed of sound in the gas is x .… NDA 2026A constant power machine pulls a block on a smooth horizontal surface. Which one of the… NDA 2026A ball is dropped from rest from height h above the ground in frame S (the Earth's… NDA 2026A pendulum of length L oscillates with an angular amplitude of θ = 60^ ^ ∘ and time… NDA 2026A solid of mass m has temperature-dependent specific heat as C(T) = C_0 + α T , where C_0… NDA 2026In a certain process, the relation between pressure (P) and volume (V) , for an ideal… NDA 2026An object is placed far beyond the centre of curvature of a concave mirror. The object… NDA 2026 Full General Science list All NDA PYQs