waves

Question 1

medium

Answer 1

material through which a wave will pass through

Question 2

frequency

Answer 2

number of waves per second

Question 3

hertz

Answer 3

unit of frequency

Question 4

ultra sound

Answer 4

sound wave with a frequency higher that 20,000Hz

Question 5

wavelength

Answer 5

distance along a wave from one point to the same point on the next wave

Question 6

ultraviolet

Answer 6

light waves with a wavelength less then 400nm

Question 7

infrared

Answer 7

light waves with a wavelenth larger then 700nm

Question 8

the primary colours of light are

Answer 8

red,blue,green

Question 9

secondary colours of light

Answer 9

cyan,magenta,yellow

Question 10

uses of infrared light

Answer 10

heaters, toasters and grills, remote controls

Question 11

uses of ultraviolet

Answer 11

tanning beds,

Question 12

longitudinal

Answer 12

wave in which the oscillation is parallel to the direction of energy transfer

Question 13

transverse

Answer 13

wave in which the oscillation is
perpendicular to the direction of
energy transfer

Question 14

amplitude

Answer 14

The maximum displacement of a
point from its undisturbed position

Question 15

crest

Answer 15

point on a wave with the maximum upward displacement from its original rest position

Question 16

trough

Answer 16

point on a wave with the maximum downward displacement from its original rest position