electromagnetic spectrum Flashcards
(19 cards)
what does roygbiv
red ornage yellow green blue , ingido and viloet
what does red have
longest wavelengthh
lowest frequency
what does voilet have
shotest wavelength
highest frequency
what is white light
a combination of all the wavelngths
what is blackness
an absense of light
what colours are not on visible light
black and white
do opque objects transmitt any light
they don’t transmitt any light . so all the walengths of light are either absorbed or reflected . no passes through them
what is visble light used for
ooptic fibres
to see the world around us
do transparent objects transmitt any light
they trasnmitt light with only a small fraction being reflected all absorbed and they transmitt light without scattering any waves
do transculent objects transmitt any light
trasmitt light but the rays are scattered . the proprotion of light they emit determine how well we can see through them
what do gamma rays have
the shortest wavelngth but the highest frequency
what do radio waves have
the longest wavelngth but the lowest frequency
how electromagnetic waves transfer energy from a
transfer energyfrom a source to an observer or object
name the order of the em spectrum from the longest wavelength to the shortest
radio waves , microwaves ,visible light infrared , ultravoilet , x-rays , gamma rays
what is gamma rays used for
in medicne - therapy , steralisation of equipemnt
food preveration
risk of useing gamma rays in medicne
extremely penatrating and damaging to living tissue howver because they have the most enrgu we can use them to kill diease and tumours
uses of x-rays
in x-rays , security , treat cancer , detect a fake note
what are the uses of ultraviolet
in lamps , in taning
what are the risk of using ultraviolet
skin burn , skin caccer and catarct
