Studied by 2 people
What is the wave speed equation?
wave speed = frequency x wavelength
What direction do transverse waves vibrate?
Sideways/perpendicular.
What direction do longitudinal waves vibrate?
Parallel.
How do you work out wave speed using distance and time?
wave speed = distance/time
What can happen when a wave meets a boundary?
Absorbed Transmitted Reflected
What is refraction?
Waves changing direction at a boundary.
What is the normal?
Imaginary line that is perpendicular to the point where the incoming hits the boundary.
What is the electromagnetic spectrum?
Radio waves. Micro waves. Infrared. Visible light. Ultraviolet. X-ray waves. Gamma rays.
True or False. Gamma rays can cause and cure cancer.
True.
What are 2 uses of x-rays?
Detect broken bones Detect metal objects in the body
What is a danger of x-rays?
Cancer.
What are 2 uses of ultraviolet?
Detect forged bank notes Destroying bacteria
What is a danger of ultraviolet rays?
Sunburn
What are 2 uses of visible light?
Seeing Photography
What is a danger of visible light?
Damage to retina cells.
What are 2 uses of infrared?
Remote control
Cooking
What are dangers of infrared?
Burns Low blood pressure
What are 2 uses of micro waves?
Cooking
Satellite signals
What is a danger of micro waves?
Burns
What is a use of radiowaves?
Communication
Are there any dangers of radiowaves?
No
What are electromagnetic waves made up of?
Oscillating charges.
Note 
Flashcard (46)