Likely the name of the chapter OP is studying.nasu said:
It refers to how the OP likes to dress when studying Physics. See their Avatar...nasu said:
Light is an electromagnetic wave, which means it consists of oscillating electric and magnetic fields that propagate through space. It can also exhibit particle-like properties, as described by the concept of photons in quantum mechanics. This dual nature is known as wave-particle duality.
Sound travels as a mechanical wave through the vibration of particles in a medium. In solids, sound travels fastest due to tightly packed particles, followed by liquids, and slowest in gases where particles are more spread out. Sound cannot travel through a vacuum because there are no particles to transmit the vibrations.
The speed of light in a vacuum is approximately 299,792 kilometers per second (km/s) or about 186,282 miles per second (mi/s). In contrast, the speed of sound in air at room temperature is roughly 343 meters per second (m/s) or about 1,235 kilometers per hour (km/h). Light travels much faster than sound.
Objects appear to have different colors because they absorb certain wavelengths of light and reflect others. The color we perceive is the wavelength of light that is reflected. For example, a red apple appears red because it reflects red wavelengths and absorbs others.
Light waves are electromagnetic waves that can travel through a vacuum, while sound waves are mechanical waves that require a medium to travel through. Light waves are transverse, meaning the oscillations are perpendicular to the direction of wave propagation. Sound waves are longitudinal, meaning the oscillations occur in the same direction as the wave propagation.