physics 4

Question 1

transverse waves

Answer 1

Energy transfer and right angles (perpendicular) to the motion of the wave. E.g. electromagnetic waves.

Question 2

Longitudinal waves

Answer 2

Energy transfers parallel to the motion of the wave. E.g. soundwaves
need particles to travel through

Question 3

law of reflection

Answer 3

angle of incidence is equal to the angle of reflection

Question 4

Refraction

Answer 4

changing direction of light at the boundary between two different materials of different densities

Question 5

Light wave

Answer 5

these can be reflected, refracted or diffracted

Question 6

Dispersion

Answer 6

spread out of waves

Question 7

frequency

Answer 7

The number of ways passing in one second. Unit is hertz

Question 8

amplitude

Answer 8

Height of a wave from the midpoint to the crest/trough

Question 9

Lens

Answer 9

A transparent tool that changes the direction of light

Question 10

vacuum

Answer 10

A volume that contains no matter

Question 11

Spectrum

Answer 11

A series of similar waves arranged in order of wavelength for frequency

Question 12

Retina

Answer 12

light sensitive areas on the back of the eye. Light must be focused on the retina in order to see clearly.

Question 13

sound waves

Answer 13

These are caused by vibrations, so need particles to transfer sound energy also can be reflected refracted or diffracted

Question 14

Ultra sound

Answer 14

above human hearing range (above 20,000 Hz)