Night vision is possible with the help of ___________?
- 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.