Infrared waves are used in night vision equipment. These waves, with wavelengths longer than visible light but shorter than microwaves, detect thermal radiation emitted by objects. This capability allows night vision devices to create images in low-light or darkness, crucial ...
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The frequency or intensity of the whistle of an approaching train increases due to the Doppler Effect. This phenomenon occurs because as the train moves towards an observer, the sound waves it emits are compressed, resulting in a higher frequency ...
Silent zones where ships do not hear lighthouse sirens are created due to interference. When sound waves from the siren meet at points where they are out of phase, destructive interference occurs, canceling the sound waves and resulting in areas ...
We listen to programs of different stations by turning the knob of the radio due to resonance. Tuning adjusts the radio’s circuit to resonate at the frequency of the desired station’s signal. This resonance allows the radio to pick up ...
The voice of a small child seems more pleasing than the voice of a young man because the pitch of a child’s voice is higher. Higher pitch is often perceived as more pleasant and less harsh compared to the lower ...