Finding Out About Light And Sound Flashcards
What is opaque ?
It is Mae of material that light can not pass through
How can you see things ?
By light rays reflecting off the object and traveling to your eye
What is absorption ?
When light falls on an object and the energy hoes into the objects surface so that no light is reflected
What is transparent ?
Made of a material that allows light through it and through which you can see clearly
What does translucent mean ?
Made of material that let’s light through it but jumbles the light so you can’t make out objects on the other side
What is the normal ?
An imaginary line that leaves the surface of a mirror at right angles . It is used as a reference line when describing rays coming to and from mirrors
What is the difference between angle of incidence and angle of reflection ?
Angle of incidence is the light rays that enter the mirror and the angle of reflection is the light rays leaving the mirror
Why can’t you see your face in paper ?
Mirror surface is smooth and reflects evenly but paper scatters the light .
What is the angle of refraction ?
The angle a ray travels after it has passed into a new material .
What is a type of model to show how light behaves by using a diagram ?
Ray diagram
What is it called when colours of light separate to form a spectrum ?
Dispersal
What happens if white light is shining on red glass ?
The red light transmits but other light colors get absorbed
What is the pitch and what does it depend on ?
Pitch is how high or low sound is
Depends on the number of vibrations that happen over second
How do sound travel ?
When object vibrates particles beside it vibrate , movement energy is passed on from one particle to another , when vibration reach you ear they turn into electrical messages , they are sent to brain and brain detects these sounds
What is it called when an object picks up something vibrating and starts vibrating itself ?
Resonance
