Light, Sound, and Optical Innovations Vocabulary Flashcards

Vocabulary practice flashcards covering fundamental light and sound concepts, wave properties, and related optical and acoustic innovations.

Light

A form of electromagnetic radiation that can travel through a vacuum, is responsible for vision, and behaves both as a wave and as particles (photons).

Electromagnetic Wave

A wave consisting of oscillating electric and magnetic fields that can propagate through space, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Speed of Light ($c$)

The constant speed at which light travels in a vacuum, given by $c = 3.0 \times 10^8\,\text{m/s}$, which slows down when passing through materials like water or glass.

Reflection

The bouncing back of light when it strikes a surface, governed by the Law of Reflection where the angle of incidence equals the angle of reflection.

Refraction

The bending of light as it passes from one medium to another due to a change in the speed of light in different media.

Dispersion

The separation of light into its component colors because different wavelengths bend at different angles.

Wavelength

The distance between wave peaks, serving as one of the key characteristics describing a wave.

Frequency ($f$)

The number of vibrations, cycles, or waves per second, measured in Hertz ($\text{Hz}$); a higher frequency corresponds to shorter wavelength, higher energy, and higher pitch in sound.

Sound

A mechanical wave produced by vibrating objects and transmitted through a medium, which cannot travel in a vacuum.

Mechanical Wave

A wave that requires a physical medium (solid, liquid, or gas) to travel.

Longitudinal Wave

A type of wave where particle motion is parallel to the wave direction, traveling through compressions and rarefactions.

Wave Speed ($v$)

The speed at which a wave travels; in sound, it depends on the medium and travels fastest in solids and slowest in gases.

Amplitude

The height of a wave from its rest position, which determines the loudness or intensity of a sound.

Pitch

The perceived highness or lowness of a sound, which depends directly on frequency.

Loudness

The intensity or volume of sound, which depends directly on wave amplitude.

Echo

The reflection of sound waves from surfaces, which requires a sufficient distance to hear the sound bounce back.

Resonance

The amplification of sound that occurs when an object vibrates at its natural frequency.

Soundproofing

The process of reducing sound transmission by using materials that absorb sound.

Sound Amplification

Increasing the strength of sound signals using devices such as microphones, amplifiers, and speakers.

LED (Light Emitting Diode)

An energy-efficient, long-lasting semiconductor device that emits light when electric current passes through it.

Laser

A device that produces a concentrated beam of light characterized by being coherent, monochromatic, and high intensity.

Hologram

A three-dimensional image formed using light interference.

Fiber Optics

A technology that uses light to transmit data over long distances.