Night vision is possible with the help of ___________?
Correct answer: C. Infrared Rays
- A. Red light
- B. Violet light
- C. Infrared Rays
- D. Ultra violet Light
- E. None of these
Explanation
Infrared radiation is used by many night-vision devices because it can be detected in darkness and is often emitted or reflected by warm objects. Red light may preserve dark adaptation but is not the basis of infrared night vision.
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Everyday physics explains motion, force, work, power, pressure, heat, light, sound and electricity through familiar devices and natural events. Topics include simple machines, friction, expansion, reflection and refraction, lenses, household circuits, electrical safety and magnetism, with mass distinguished from weight and heat distinguished from temperature.
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