Waves(p)(p1/2) Flashcards
(37 cards)
Are waves sometimes, always or never reflected
Sometimes
What can happen to waves(3)
Reflected, absorbed and transmitted
What is the angle incident to the angle reflection
Always equal
What is speculation reflection
Occurs on flat surface, producing a clear image.
What is diffuse reflection?
Occurred on material with bumpy surface, meaning reflection is not so clear
What is a wave?
Transfers energy from one place to another
What is the wavelength?
The distance of the entire oscillation
What is a longitudinal wave
Oscillations that are parallel to direction of energy transfer(exp: sound waves, seismic waves)
What is a transverse wave?
Oscillations that are perpendicular to direction of energy transfer(exp: electromagnetic waves[light, radio, string])
What occurs at refraction of light waves?
They change direction as they pass from one medium to another
Why do waves travel at different speeds In different material?
They have different different densities
What does it mean when there’s higher density? (To waves)
The waves are slower
What happens to waves that travel at an angle to more dense areas?
Will align towards the normal. Called refracted ray
What happens when waves travel at an angle to less dense area?
They bend away from normal (emergency ray)
What happens to the waves when they pass through different medians?
The speed of the waves changes
What is the formula which includes wave speed, frequency and wavelength
Wave speed = frequency x wavelength
Frequency stays the same
Wavelength decreases
Speed increases
What are electromagnetic waves?
They are transverse and travel at different speeds.
What are the different electromagnetic waves?
Radio waves
Microwaves
Infra red waves
Visible light
Ultra violet
X-rays
Gamma rays
What are gamma rays made from?
Radioactive decay
What are ultraviolet’s made from?
From electrons dropping down energy levels
Where do InfrA red waves come from?
Bonds that hold molecules together vibrate
How fast do electromagnet travel?
3x10(8) m/s
What do radio waves have?
Long wavelengths and low frequencies
What are electromagnetic waves made from?
Oscillating electric and magnetic fields