WAVES
What is a wave?
A disturbance that travels through a medium, transferring energy from one place to another.
What is the electromagnetic spectrum?
The range of all types of electromagnetic radiation.
What is reflection?
The bouncing back of a wave when it hits a barrier.
What is an example of electromagnetic waves used in communication?
Radio waves used in broadcasting.
What are the two types of waves?
Mechanical waves and electromagnetic waves.
What type of waves are found in the spectrum?
Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
What is refraction?
The bending of a wave as it passes from one medium to another.
What is an application of infrared waves?
Used in remote controls and thermal imaging.
What is wavelength?
The distance between two consecutive crests or troughs of a wave.
What is a visible light wave?
The portion of the electromagnetic spectrum that can be detected by the human eye.
What is diffraction?
The spreading of waves when they pass through a narrow opening.
How are X-rays used in medicine?
For imaging internal body structures.
What is frequency?
The number of waves that pass a given point in one second.
What type of energy is associated with electromagnetic waves?
Radiant energy.
How do sound and light waves differ?
Sound waves are mechanical and require a medium; light waves are electromagnetic and can travel through a vacuum.
What is an example of how microwaves are used?
In microwave ovens for cooking food.
What is amplitude?
The height of the wave from its rest position, which indicates the energy of the wave.
What is the speed of light in a vacuum?
Approximately 299,792 kilometers per second (or about 300,000 kilometers per second).
What is the relationship between frequency and energy?
Higher frequency waves carry more energy.
What is the role of visible light in photosynthesis?
It is used by plants to convert carbon dioxide and water into glucose and oxygen.