Question

step 1. study this content. you need to use ope to demonstrate this very clearly and neatly. options for studying:

• go to ilmnconnect with a computer
• click on physical science and then p. 03.
• watch all of the videos on the page and take notes. theyll help you on questions.
• click on the buttons for the tutorials (\how light interacts\ and \the solar system\).
• complete the tutorials and take notes as you need.

you must submit these notes to get the 2nd part of the activity and recovery credit.
define and illustrate (draw pictures) these terms:

• compressional (longitudinal) wave
• electromagnetic wave
• frequency
• wavelength
• reflection
• refraction
• absorption

Explanation:

1. Compressional (longitudinal) wave: A wave where the particles of the medium move parallel to the direction of wave propagation. For illustration, imagine a slinky toy being pushed and pulled at one - end. The regions where the coils are closer together are compressions and where they are farther apart are rarefactions.
2. Electromagnetic wave: A wave that consists of oscillating electric and magnetic fields perpendicular to each other and to the direction of wave propagation. It can travel through a vacuum. For example, light is an electromagnetic wave. A simple illustration could be two perpendicular sine - waves representing the electric and magnetic fields.
3. Frequency: The number of complete wave cycles that pass a given point in a unit of time. Measured in hertz (Hz). For illustration, if a pendulum swings back and forth 5 times in 1 second, its frequency is 5 Hz.
4. Wavelength: The distance between two consecutive points in a wave that are in - phase (e.g., two consecutive crests or troughs). It is usually denoted by $\lambda$. For a water wave, the distance between two adjacent wave crests is the wavelength.
5. Reflection: The bouncing back of a wave when it hits a boundary between two media. For example, when light hits a mirror, it reflects. You can draw a ray of light hitting a mirror at an angle and then the reflected ray leaving the mirror at the same angle with respect to the normal.
6. Refraction: The bending of a wave as it passes from one medium to another due to a change in its speed. For example, when a pencil is placed in a glass of water, it appears bent. This is because light is refracting as it moves from air into water.
7. Absorption: The process by which a wave's energy is transferred to the medium through which it is passing. For example, black objects absorb most of the visible light that falls on them, converting the light energy into heat energy.

Answer:

• Compressional (longitudinal) wave: Definition - A wave with particle motion parallel to wave propagation. Illustration - Slinky showing compressions and rarefactions.
• Electromagnetic wave: Definition - Wave with oscillating perpendicular electric and magnetic fields. Illustration - Perpendicular sine - waves for fields.
• Frequency: Definition - Number of wave cycles per unit time. Illustration - Pendulum swings per second.
• Wavelength: Definition - Distance between in - phase points on a wave. Illustration - Distance between water wave crests.
• Reflection: Definition - Wave bouncing back at a boundary. Illustration - Light ray reflecting off a mirror.
• Refraction: Definition - Wave bending when changing media. Illustration - Pencil appearing bent in water.
• Absorption: Definition - Wave energy transfer to the medium. Illustration - Black object absorbing light.