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What is electromagnetic spectrum

it is radiation energy transmitted through space travels as many different wavelengths

What does the electromagnetic spectrum consist of

rays or waves which transfer energy from one point to another

What is the speed of the electromagnetic spectrum

they all travel at the same speed, "the speed of light"

What is the electromagenetic spectrum measured in

nanometre (equal to one-millionth of a millimetre) nm

What are the properties of the electronmagnetic spectrum

travel at the speed of light, all transverse waves, reflected, refracted and diffracted, all travel through vacuum (DO NOT NEED ATOMS OR MOLECULES TO MOVE THEM)

What is the visible spectrum

rays that are visible to the human eye, colours of the rainbow and other rays such as ultra-violet or x-rays (invisible to human eye)

What are the colours of the visible spectrum

Violet, indigo, blue, green, yellow, orange, red - backwards Robert of York goes back in victory

What radiation rays are used in beauty therapy

ultra-violet rays (UVR), infra-red rays (IR), visible light, they are called bands

Do they produce heat

not much but have strong effect on skin

What is the UV ray 100-280 nm

wavelength for UVC

What is the UV ray 315-400 nm

wavelength for UVA

What is the UV ray 280-315 nm

wavelength for UVB

What are UVA and UVB rays used for

tanning beds, lamps or solarium

What is the shortest wavelenght and most lethal

UVC - 100-280 nm

What are the effects of UVA and UVB

thickens stratum corneum, sunburn, premature aging, causes skin cancer, creates skin sensitivity destorying langerhans cells, can cause hyper-pigmentation and hypo pigmentation can also cause photosensitivity

What are the benefits of UVA and UVB

warms body, increases cellular regeneration and desquamation, stimulates Vit D, releases endorphins, tannings good for psorasis

What is the inverse square law

intensity of rays from a point source varies inversely with the square of the distance from the source

What is the intensity of rays with regards inverse law square

intensity if four times greater at half the distance

What is the distance of rays with regards inverse law

at twice distance the intensity of rays wil be quartered

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