- Ultraviolet (UV) light is used to reveal fluorescent security features in currency notes. - These features are difficult to replicate by counterfeiters.
Which one of the following waves is used for detecting forgery in currency notes ?
Asked in UPSC NDA 2 2017 · Topic: Wave Motion (Electromagnetic Waves: Properties, Electromagnetic Spectrum, Energy and Momentum)
More Physics questions
- Which one among the following waves carries the maximum energy per photon ?
- Which of the following are the characteristics of electromagnetic waves ? They are elastic waves. They can also move in vacuum. They have electric and magnetic components which are mutually perpendicular. They move with a speed equal to 3 lakh meters per second. Select the correct answer using the code given below :
- Television signals are :
- FM broadcasting service uses the range of frequency bands between
- The waves used in common TV remote control are
- Waves of the Ultra High Frequency (UHF) range normally propagate by means of
- The rest mass of a photon is
- When the frequency of an electromagnetic wave and ultrasonic wave are same, then