Topic 3 Light And Sound Flashcards
(16 cards)
Opaque
Not letting light through
Translucent
Allowing light but not detailed shapes to pass through its semi transparent
Transparent
Allowing light to pass through
Incident ray
A ray of light that strikes a surface
Angle of incidence
It’s the angle between the incoming light and an invisible line that stands straight up from the surface this tells us how the light hits the surface
Angle of reflection
The angle between the bounced light aka reflected ray and the normal it’s always equal to thr angle of incidence
Normal in physics
Normal means a perpendicular surface
Ray diagram
A ray diagram is a drawing that shows light rays travel and interact with surfaces like reflecting off mirrors or refracting through lenses
The law of reflection
It states that the angle of incidence is equal to the angle of reflection and both angles are measured from the normal to the surface
Refraction
The bending of light when it passes from one medium to another with a different density causing a change in speed and direction
The eye
The eye is the sense organ that detects light and allows us to see it focuses light onto the retina where signals are sent to the brain to form images
Wavelength
The distance between two corresponding points on a wave
The ear
An organ responsible for hearing and balance it collects sound waves converts them into electrical signals and sends them to the brain for processing
Amplitude
Amplitude is how far particles move from their rest position big amplitude means loud sound and small amplitude means soft sound it shows how strong the vibration is
Frequency
How many waves pass a certain point in one second it’s measured in Hertz the higher the frequency the more waves pass in a given time
Human hearing range
The human hearing range is the range of frequencies that humans can hear
