Electromagnetic spectrum
Radios and microwaves both use radiation from the electromagnetic spectrum
Visible light can be split into a spectrum of colours .. from red through the rainbow colours to violet but visible light is just a small part of the whole electromagnetic spectrum
All the different types of electromagnetic waves travel at the same speed through a vacum .. the waves can be orderd by wave length remebered that waves with the shortest wave lengths have the highest frequency and the most energy and the waves with the lowest wavelengths have the longest frequency and the least energy
So if we go through the wavelength in size order .. at the begining of the spectrum is
GAMMA RADIATION .. gamma radiation cant be seen or felt , but it does pass through soft skin and tissue , and some of it is absorbed by cells. Gamma waves have a very high frequency and is used to sterilise surgical equipment , and can treat cancer but too much gamma radiation can actually causes cancer.
HIGH FREQUENCY
CANT BE SEEN
TOO MUCH CAN CAUSE CANCER.
Next on the wavelength is XRAYS .. they have a loinger wavelength that gamma radiation , xrays also cant be seen or felt but can pass through soft tissue like gamma rays but dont easily pass through metal or bone this is why theyre useful to ‘xray’ the bones in our bodies
LONGER WAVELENGTH
CANT BE SEEN
USED TO XRAY THE BONES IN OUR BODIES.
Next is ULTRAVIOLET radiation or better known as uv.. it is found naturally in sunlight and yet again we cant see or feel it but our skin responds to it by turning darker.. this is how we get a tan , its used in sunbeds secuirty pens Some chip shops use uv light ...
The lamp gives off UV (which you can't see) as well as violet light (which you can see).
The UV attracts insects, which are electrocuted by high-voltage wires near the lamp - so they won't land on the food and contaminate it.
USED FOR TANNING
FOUND NATURALLY IN SUNLIGHT
Next is VISABLE LIGHT .. all the light that we can see with
Visible light can be split into a spectrum of colours .. from red through the rainbow colours to violet but visible light is just a small part of the whole electromagnetic spectrum
All the different types of electromagnetic waves travel at the same speed through a vacum .. the waves can be orderd by wave length remebered that waves with the shortest wave lengths have the highest frequency and the most energy and the waves with the lowest wavelengths have the longest frequency and the least energy
So if we go through the wavelength in size order .. at the begining of the spectrum is
GAMMA RADIATION .. gamma radiation cant be seen or felt , but it does pass through soft skin and tissue , and some of it is absorbed by cells. Gamma waves have a very high frequency and is used to sterilise surgical equipment , and can treat cancer but too much gamma radiation can actually causes cancer.
HIGH FREQUENCY
CANT BE SEEN
TOO MUCH CAN CAUSE CANCER.
Next on the wavelength is XRAYS .. they have a loinger wavelength that gamma radiation , xrays also cant be seen or felt but can pass through soft tissue like gamma rays but dont easily pass through metal or bone this is why theyre useful to ‘xray’ the bones in our bodies
LONGER WAVELENGTH
CANT BE SEEN
USED TO XRAY THE BONES IN OUR BODIES.
Next is ULTRAVIOLET radiation or better known as uv.. it is found naturally in sunlight and yet again we cant see or feel it but our skin responds to it by turning darker.. this is how we get a tan , its used in sunbeds secuirty pens Some chip shops use uv light ...
The lamp gives off UV (which you can't see) as well as violet light (which you can see).
The UV attracts insects, which are electrocuted by high-voltage wires near the lamp - so they won't land on the food and contaminate it.
USED FOR TANNING
FOUND NATURALLY IN SUNLIGHT
Next is VISABLE LIGHT .. all the light that we can see with