Comprehensive Study Notes on Waves and Wave Properties

A wave is defined as a disturbance that transfers energy from one place to another.
Wavelength is the distance between corresponding points on adjacent waves.
Amplitude refers to the maximum extent of a vibration or oscillation, measured from the position of equilibrium.
Frequency describes how many waves pass a fixed point in a given amount of time, expressed in Hertz (Hz).
The speed of a wave is dependent on the medium through which it travels.

Light travels faster than sound, which accounts for seeing lightning before hearing thunder during a storm.
- This reflects how energy travels through different mediums, where light is significantly faster.
Faster comparison: Light speed > Sound speed

Transverse Waves: The highest points are called crests, and the lowest points are called troughs.
Longitudinal Waves: In a longitudinal wave produced in a coiled spring, areas where the coils are farthest apart are called rarefactions.
Mechanical Waves: Created when a medium vibrates back and forth or moves up and down.

Reflection: Occurs when a wave bounces back after hitting a barrier.
Refraction: Involves the bending of waves as they enter a new medium at an angle, changing their speed.
- This is due to different wave speeds in different materials.
Diffraction: The bending of waves around the edge of a barrier.
Interference: When waves meet, they can combine to form a new wave pattern based on their amplitudes and phases.

The electromagnetic spectrum ranges from radio waves to gamma rays, ordered by increasing frequency:
1. Radio Waves - Lowest frequencies
2. Microwaves
3. Infrared Waves
4. Visible Light - The part of the spectrum visible to the human eye
5. Ultraviolet Waves
6. X-rays
7. Gamma Rays - Highest frequencies
Each type of wave has distinct properties and applications:
- Gamma Rays have the highest frequency and energy.
- X-rays are used medically to image bones and teeth.
- Infrared Radiation detects temperature variations in thermograms.

A medium is any material through which a wave travels, such as air, water, or solid substances.
In vacuum: All electromagnetic waves travel at the same speed, approximately $3 imes 10^8 ext{ m/s}$ .
As the frequency of a wave traveling at constant speed increases, its wavelength decreases according to the wave speed formula:
$ext{Speed} = ext{Frequency} imes ext{Wavelength}$
The greater the energy of a mechanical wave, the greater its amplitude.

Communication satellites orbiting Earth utilize radio, television, and telephone signals to transmit information worldwide.
Understand the utility of various waves in technology, safety imaging (X-rays), and thermal detection (infrared).