Year 9 Physics - Sound and Light

Electromagnetic radiation varies both

________ relative to frequency and wavelength.

Electromagnetic waves

________ vary due to their wavelength, as this relates to the amount of energy transferred.

EMR

________- shows wave- like properties as it travels through space, and moves in a straight line.

light

a type of energy that travels in waves

the only type of electromagnetic radiation humans can see

visible light

all electromagnetic waves travel at the speed of

light

short wavelength means

high energy

long wavelength means

low energy

xrays have

shorter wavelengths and higher energy than light

microwaves have

longer wavelengths and lower amounts of energy than light

EMR stands for

electromagnetic radiation

electromagnetic radiation varies relative to

frequency and wavelength

light is

a type of radiation

radiation is

any type of energy given off by objects as waves or particles

the full spectrum of radiation is the

electromagnetic spectrum

EMS stands for

electromagnetic spectrum

EMR can move through

vacuums at the speed of light

sound that is too high for us to hear is

ultrasound

pitch corresponds to _

frequency

we use _ to measure noise

decibels

decibels are __

logarithmic

human range of pitch we can hear

20 - 20,000 Hz