Light wave is a transverse wave. Transverse waves are characterized by oscillations perpendicular to the direction of energy transfer. In the case of light, electric and magnetic fields oscillate perpendicular to the direction of propagation. This distinguishes light from longitudinal ...
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Light is made up of small particles, which are called “Photon”. Photons are fundamental particles of light that exhibit both wave-like and particle-like properties. They have no mass and carry electromagnetic radiation.
The unit of measurement of sound intensity is Decibel (dB). Decibel is a logarithmic unit that quantifies the intensity or loudness of sound. It expresses the ratio of a sound level to a reference level, such as the threshold of ...
On hearing thunder, a person opens his mouth so that to equalize the air pressure on the eardrum of both the ears. This helps balance the pressure inside and outside the ears, reducing discomfort caused by sudden changes in atmospheric ...
The instrument used to detect submerged objects is called “Sonar”. Sonar stands for Sound Navigation and Ranging. It operates by emitting sound waves into water and detecting the echoes bounced back from underwater objects. Sonar is essential for applications like ...
The standard sound level for humans is 60 dB. This level represents the threshold of normal conversation and is commonly used as a reference point for measuring other sound levels. Sound levels above 85 dB can cause hearing damage with ...
Acoustic science is related to sound. It involves the study of sound waves, their generation, transmission, and effects in different mediums such as air, water, and solids. Acoustic science encompasses areas like sound propagation, resonance, and applications in music, communication, ...
Echo sounding is used to measure the depth of the sea. It involves sending sound waves (usually low-frequency) into the water and measuring the time it takes for the sound waves to bounce off the seafloor and return. By calculating ...
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 ...
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 ...