NDA Light and Optics questions with solutions
Reflection, refraction, lenses and the human eye. 37 questions from our 2016–2025 NDA pattern papers, from the Class 12 Physics syllabus. Each has the answer and a full solution.
NDA 2025
- The twinkling of stars at night is caused by
- A concave mirror is used as a shaving mirror because, when the face is within its focal length, it forms an image that is
- The refractive index of glass is 1.5. If the speed of light in vacuum is 3 x 10^8 m/s, the speed of light in glass is
- A person with myopia (short-sightedness) can see nearby objects clearly, but not distant ones. The defect is corrected using
NDA 2024
NDA 2023
- A mirage seen on a hot road in summer is caused by
- Spherical mirrors is/are correct? 1. A concave mirror can form both real and virtual images. 2. A convex mirror always forms a virtual, erect and…
- Human eye is/are correct? 1. The retina is the light-sensitive layer on which the image is formed. 2. The iris controls the amount of light entering…
NDA 2022
- The speed of light in a vacuum is the same for all colours. 2. The speed of light in glass is greater than its speed in air.
- A concave mirror has a radius of curvature of 40 cm. Its focal length is
- The sparkling of a diamond is mainly due to
- When white light passes through a glass prism, the colour that is deviated the most is
- The part of the human eye that controls the amount of light entering it is the
- The cells of the retina responsible for vision in dim light are the
NDA 2021
NDA 2020
- An object is placed at a distance of 2f from a convex lens of focal length f. The image formed is
- A person can see nearby objects clearly but cannot see distant objects clearly. The defect and the lens used to correct it are
- Total internal reflection. 1. It can occur when light travels from a rarer medium to a denser medium. 2. The brilliance of a diamond is largely due…
- A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 20 cm. The power of the combination is
NDA 2019
- Total internal reflection can occur when light travels from water into air. 2. The critical angle depends on the pair of media involved.
- Two plane mirrors are placed at right angles to each other and an object is kept between them. The number of images formed is
- Danger signals are made red mainly because red light
NDA 2018
NDA 2017
- Light: 1. The speed of light is the same in all transparent media. 2. Light waves are transverse in nature.
- When an object is placed at the principal focus of a concave mirror, the image is formed
- The twinkling of stars is due to
- A ray of light passing through the optical centre of a thin lens
- Total internal reflection can occur when light travels from a denser to a rarer medium. 2. For total internal reflection the angle of incidence must…
- When white light passes through a glass prism, the colour that deviates the least is
NDA 2016
Other General Knowledge topics
Current Affairs 37Indian Economy 36Constitution and Fundamental Rights 46Parliament, Executive and Judiciary 23Ancient India 36Medieval India 28Freedom Struggle 50Modern India and British Rule 41World Geography 29Indian Geography 81Physical Geography 31Units and Measurements 11Motion, Forces and Gravitation 40Work, Energy and Power 7Fluids and Pressure 10Heat and Thermal Physics 8Sound and Waves 16Current Electricity 20Magnetism and Electromagnetic Induction 17Nuclear and Modern Physics 9Atomic Structure, Periodic Table and Bonding 31Acids, Bases and Salts 13Metals, Alloys and Corrosion 20Carbon and Organic Chemistry 22Chemical Reactions 12Mole Concept and States of Matter 13Chemistry in Everyday Life 16Cell Biology and Classification 18Genetics and Heredity 13Plant Physiology 21Nutrition, Diseases and Health 28Human Physiology 62Ecology and Environment 24