waves

Question 1

what is a londitudinal wave

Answer 1

Direction of oscillation is PARALLEL to the direction of energy transfer (e.s. sound. seismic P waves). Consists of COMPRESSIONS & RAREFACTIONS.

Question 2

what does wavelength/time period/frequency mean

Answer 2

WAVELENGTH (m) - length of one complete wave

Time period (s) - the time taken for one wave to pass

FREQUENCY (Hz) - the number Of waves pass every second

Question 3

what is a transverse wave

Answer 3

TRANSVERSE WAVES: the direction of oscillation iS PERPENDICULAR to the direction of energy transfer (e.g. waves. seismic S waves. light. EM waves).

Question 4

what are the wave equations

Answer 4

wavespeed (m/s) frequency (Hz) x wavelength (m)

Question 5

name from longest to shortest wave the order of the em spectrum and give examples

Answer 5

RADIO WAVES Phones. TV, WIFI

MICRO WAVES Cooking (absorbed by water)

INFRA-RED Cooking (absorbed by surface)

VISIBLE LIGHT vision

ULTRA VIOLET Tanning can cause skin cancer

X-RAYS Medical scans. also dangerous

GAMMA RAYS Sterilisins, medical treatments. also dangerous