Physics Flashcards
What are the parts of the electromagnetic spectrum in order?
Radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, gamma rays
What is visible light waves used for?
Lighting
What is infrared used for?
short range communications
What are gamma rays used for?
Sterilizing medical equipment
What are x-ray waves used for?
Medical imagining
What are ultraviolet waves used for?
Sterilizing water, detecting forgin bank notes
What is the electromagnetic spectrum?
A family of waves that are all transverse and can travel through a vacuum
How do you measure the wavelength of a longitudal wave
Distance between two compressions or rarefactions
What is the compressions of a longitudal wave
A compression is a region in a longitudinal wave where the particles are closest together.
What is the rarefactions of a longitudal wave?
A rarefaction is a region in a longitudinal wave where the particles are furthest apart.
What is an example of a transverse wave?
Light
What is an example of a longitudal wave?
Sound
What is the crest on the transverse wave?
Top of the wave
What is the amplitude of a transverse wave?
Distance from the centerline to the crest or trough
Where is the trough of a transverse wave
Bottom of the wave
What is the wavelength?
And how is it mesured?
Length of one wave. Measured from crest to crest or from trough to trough. It is measured in meters
What are the two main types of waves?
Transverse and longitudal
What do all waves transfer and not?
Energy but not matter
What is the danger of UV radiation
Over exposure can cause Damaging to skin cells, cause burns or damage DNA which can lead to skin cancer
What protects you from Uv radiation the most and the least
Sunscreen and least is nothing
What are the 3 main types of fossil fuels?
Coal, Oil and Gas
What are the problems with fossil fuels
They are a finite resource and it is difficult to get them put of the ground and transport them. They also take along time to form. When they are burned they release green house gases that cause pollution
What are the 4 main types of renewable energy
Wind, Solar ,Wave and hydro
What is a renewable energy and how does it work?
The wind turns the blades that make the blades rotate, the rotating blades then turns a shaft that is connected to the generator which creates electricity as it turns
What is a pro and Con of wind power
Pro- does not release any carbon emissions.
Con- Can ruin a landscape and it generates low or no electricity when there is little or low wind
