Term
|
Definition
| Waves transfer energy without transferring any matter |
|
|
Term
|
Definition
| A vibrartion (something moving to and fro repeatedly) |
|
|
Term
| What are the two types of wave mtion? |
|
Definition
|
|
Term
| List examples of transverse waves |
|
Definition
| Water waves, electromagnetic waves, waves on strings, S-waves |
|
|
Term
|
Definition
| the oscillations are perpendicular to the direction of travel of the wave |
|
|
Term
| List examples of longitudinal waves |
|
Definition
|
|
Term
|
Definition
| Maximum dispalcement from equilibrium position |
|
|
Term
|
Definition
| Distance from a point on a wave to the same point on the next wave cycle |
|
|
Term
|
Definition
| Number of oscillations per second |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| the substance the wave is travelling through |
|
|
Term
|
Definition
| Angle of reflection = Angle of incidence |
|
|
Term
| Describe the image in a mirror |
|
Definition
Virtual image
Same distance behind the mirror as the object is in front of it |
|
|
Term
|
Definition
| When a wave crosses a boundary at an angle, if the speed changes the direction of travel changes |
|
|
Term
| What happens to the speed of a wave in shallower water? |
|
Definition
|
|
Term
| Does light travel slower or faster in glass/Perspex/water than in air? |
|
Definition
|
|
Term
| In refraction, if the waves slows down, which way does it refract? |
|
Definition
|
|
Term
| What is the speed of light in air or a vacuum |
|
Definition
|
|
Term
|
Definition
| Waves spreading out through a gap or round a barrier |
|
|
Term
| When is diffraction most obvious |
|
Definition
| When waves pass through a gap of about one wavelength |
|
|
Term
| ich are diffracted more, long wavelengths or short wavelengths? |
|
Definition
|
|
Term
| For sound, higher frequency = |
|
Definition
|
|
Term
| For sound, bigger amplitude = |
|
Definition
|
|
Term
| What is the range of human hearing |
|
Definition
| approximately 20 Hz to 20 kHz |
|
|
Term
|
Definition
|
|
Term
| Describe the lines that light travels |
|
Definition
|
|
Term
|
Definition
| Aline to show the direction of part of a light wave |
|
|
Term
| What type of image can be seen on a screen? |
|
Definition
|
|
Term
| What type of image cannot be seen on a screen? |
|
Definition
|
|
Term
| What is another name for a convex lens |
|
Definition
|
|
Term
| What is another name for a concave lens |
|
Definition
|
|
Term
| What must be true about the angle of incidence for total internal reflection to occur? |
|
Definition
| Angle of incidence must be bigger than the critical angle (for that boundary) |
|
|
Term
| Which way round is the change in speed for total internal reflection to occur? |
|
Definition
| It happens when travelling from a slower to a faster medium |
|
|
Term
| How do light/infra-red signals travel along an optical fibre |
|
Definition
| By repeated total internal reflection |
|
|
