Which of the following types of electromagnetic waves is ...
Which of the following types of electromagnetic waves is used in night vision goggles?
Microwaves
Ultraviolet waves
Infrared waves
Radio waves
Correct answer is C
Infrared waves are used in night vision goggles because they can penetrate the darkness and allow people to see objects that are not visible to the naked eye
Which of the following is/are longitudinal wave(s)? I. Light waves from the sun II. Sound waves...
An electric iron is rated 1000W, 230V. What is the resistance of its elements? ...
I. reproducibility II. Sensibility III. High terminal capacity iv. High accuracy The quantities ...
The main difference between echo and reverberation is that ...